diff --git a/templates/org/create.tmpl b/templates/org/create.tmpl
index 7e988ba0c7..966150aa93 100644
--- a/templates/org/create.tmpl
+++ b/templates/org/create.tmpl
@@ -19,15 +19,15 @@
 						<span class="inline required field"><label for="visibility">{{.locale.Tr "org.settings.visibility"}}</label></span>
 						<div class="inline-grouped-list">
 							<div class="ui radio checkbox">
-								<input class="enable-system-radio" tabindex="0" name="visibility" type="radio" value="0" {{if .DefaultOrgVisibilityMode.IsPublic}}checked{{end}}>
+								<input class="enable-system-radio" name="visibility" type="radio" value="0" {{if .DefaultOrgVisibilityMode.IsPublic}}checked{{end}}>
 								<label>{{.locale.Tr "org.settings.visibility.public"}}</label>
 							</div>
 							<div class="ui radio checkbox">
-								<input class="enable-system-radio" tabindex="0" name="visibility" type="radio" value="1" {{if .DefaultOrgVisibilityMode.IsLimited}}checked{{end}}>
+								<input class="enable-system-radio" name="visibility" type="radio" value="1" {{if .DefaultOrgVisibilityMode.IsLimited}}checked{{end}}>
 								<label>{{.locale.Tr "org.settings.visibility.limited"}}</label>
 							</div>
 							<div class="ui radio checkbox">
-								<input class="enable-system-radio" tabindex="0" name="visibility" type="radio" value="2" {{if .DefaultOrgVisibilityMode.IsPrivate}}checked{{end}}>
+								<input class="enable-system-radio" name="visibility" type="radio" value="2" {{if .DefaultOrgVisibilityMode.IsPrivate}}checked{{end}}>
 								<label>{{.locale.Tr "org.settings.visibility.private"}}</label>
 							</div>
 						</div>
diff --git a/templates/org/settings/options.tmpl b/templates/org/settings/options.tmpl
index 03827e4c3f..ecc269481d 100644
--- a/templates/org/settings/options.tmpl
+++ b/templates/org/settings/options.tmpl
@@ -40,19 +40,19 @@
 							<label for="visibility">{{.locale.Tr "org.settings.visibility"}}</label>
 							<div class="field">
 								<div class="ui radio checkbox">
-									<input class="enable-system-radio" tabindex="0" name="visibility" type="radio" value="0" {{if eq .CurrentVisibility 0}}checked{{end}}>
+									<input class="enable-system-radio" name="visibility" type="radio" value="0" {{if eq .CurrentVisibility 0}}checked{{end}}>
 									<label>{{.locale.Tr "org.settings.visibility.public"}}</label>
 								</div>
 							</div>
 							<div class="field">
 								<div class="ui radio checkbox">
-									<input class="enable-system-radio" tabindex="0" name="visibility" type="radio" value="1" {{if eq .CurrentVisibility 1}}checked{{end}}>
+									<input class="enable-system-radio" name="visibility" type="radio" value="1" {{if eq .CurrentVisibility 1}}checked{{end}}>
 									<label>{{.locale.Tr "org.settings.visibility.limited"}}</label>
 								</div>
 							</div>
 							<div class="field">
 								<div class="ui radio checkbox">
-									<input class="enable-system-radio" tabindex="0" name="visibility" type="radio" value="2" {{if eq .CurrentVisibility 2}}checked{{end}}>
+									<input class="enable-system-radio" name="visibility" type="radio" value="2" {{if eq .CurrentVisibility 2}}checked{{end}}>
 									<label>{{.locale.Tr "org.settings.visibility.private"}}</label>
 								</div>
 							</div>
diff --git a/templates/projects/view.tmpl b/templates/projects/view.tmpl
index 700b40c39b..d6b7dbc776 100644
--- a/templates/projects/view.tmpl
+++ b/templates/projects/view.tmpl
@@ -76,10 +76,10 @@
 					</div>
 					{{if and $canWriteProject (ne .ID 0)}}
 						<div class="ui dropdown jump item">
-							<div class="gt-px-3" tabindex="-1">
+							<div class="gt-px-3">
 								{{svg "octicon-kebab-horizontal"}}
 							</div>
-							<div class="menu user-menu" tabindex="-1">
+							<div class="menu user-menu">
 								<a class="item show-modal button" data-modal="#edit-project-column-modal-{{.ID}}">
 									{{svg "octicon-pencil"}}
 									{{ctx.Locale.Tr "repo.projects.column.edit"}}
diff --git a/templates/repo/create.tmpl b/templates/repo/create.tmpl
index 2025cac566..0fcdf13f1e 100644
--- a/templates/repo/create.tmpl
+++ b/templates/repo/create.tmpl
@@ -77,40 +77,40 @@
 						<div class="inline field">
 							<label>{{.locale.Tr "repo.template.items"}}</label>
 							<div class="ui checkbox">
-								<input name="git_content" type="checkbox" tabindex="0" {{if .git_content}}checked{{end}}>
+								<input name="git_content" type="checkbox" {{if .git_content}}checked{{end}}>
 								<label>{{.locale.Tr "repo.template.git_content"}}</label>
 							</div>
 							<div class="ui checkbox" {{if not .SignedUser.CanEditGitHook}}data-tooltip-content="{{.locale.Tr "repo.template.git_hooks_tooltip"}}"{{end}}>
-								<input name="git_hooks" type="checkbox" tabindex="0" {{if .git_hooks}}checked{{end}}>
+								<input name="git_hooks" type="checkbox" {{if .git_hooks}}checked{{end}}>
 								<label>{{.locale.Tr "repo.template.git_hooks"}}</label>
 							</div>
 						</div>
 						<div class="inline field">
 							<label></label>
 							<div class="ui checkbox">
-								<input name="webhooks" type="checkbox" tabindex="0" {{if .webhooks}}checked{{end}}>
+								<input name="webhooks" type="checkbox" {{if .webhooks}}checked{{end}}>
 								<label>{{.locale.Tr "repo.template.webhooks"}}</label>
 							</div>
 							<div class="ui checkbox">
-								<input name="topics" type="checkbox" tabindex="0" {{if .topics}}checked{{end}}>
+								<input name="topics" type="checkbox" {{if .topics}}checked{{end}}>
 								<label>{{.locale.Tr "repo.template.topics"}}</label>
 							</div>
 						</div>
 						<div class="inline field">
 							<label></label>
 							<div class="ui checkbox">
-								<input name="avatar" type="checkbox" tabindex="0" {{if .avatar}}checked{{end}}>
+								<input name="avatar" type="checkbox" {{if .avatar}}checked{{end}}>
 								<label>{{.locale.Tr "repo.template.avatar"}}</label>
 							</div>
 							<div class="ui checkbox">
-								<input name="labels" type="checkbox" tabindex="0" {{if .labels}}checked{{end}}>
+								<input name="labels" type="checkbox" {{if .labels}}checked{{end}}>
 								<label>{{.locale.Tr "repo.template.issue_labels"}}</label>
 							</div>
 						</div>
 						<div class="inline field">
 							<label></label>
 							<div class="ui checkbox">
-								<input name="protected_branch" type="checkbox" tabindex="0" {{if .protected_branch}}checked{{end}}>
+								<input name="protected_branch" type="checkbox" {{if .protected_branch}}checked{{end}}>
 								<label>{{.locale.Tr "repo.settings.protected_branch"}}</label>
 							</div>
 						</div>
@@ -176,7 +176,7 @@
 						</div>
 						<div class="inline field">
 							<div class="ui checkbox" id="auto-init">
-								<input name="auto_init" type="checkbox" tabindex="0" {{if .auto_init}}checked{{end}}>
+								<input name="auto_init" type="checkbox" {{if .auto_init}}checked{{end}}>
 								<label>{{.locale.Tr "repo.auto_init"}}</label>
 							</div>
 						</div>
@@ -211,7 +211,7 @@
 						<div class="inline field">
 							<label>{{.locale.Tr "repo.template"}}</label>
 							<div class="ui checkbox">
-								<input name="template" type="checkbox" tabindex="0">
+								<input name="template" type="checkbox">
 								<label>{{.locale.Tr "repo.template_helper"}}</label>
 							</div>
 						</div>
diff --git a/templates/repo/editor/commit_form.tmpl b/templates/repo/editor/commit_form.tmpl
index 5833687753..b07059777f 100644
--- a/templates/repo/editor/commit_form.tmpl
+++ b/templates/repo/editor/commit_form.tmpl
@@ -16,7 +16,7 @@
 		</div>
 		<div class="inline field">
 			<div class="ui checkbox">
-				<input name="signoff" type="checkbox" tabindex="0">
+				<input name="signoff" type="checkbox">
 				<label>{{.locale.Tr "repo.editor.signoff_desc"}}</label>
 			</div>
 		</div>
diff --git a/templates/repo/issue/new_form.tmpl b/templates/repo/issue/new_form.tmpl
index ae43d70c4a..ca1ff287d0 100644
--- a/templates/repo/issue/new_form.tmpl
+++ b/templates/repo/issue/new_form.tmpl
@@ -11,7 +11,7 @@
 				{{ctx.AvatarUtils.Avatar .SignedUser 40}}
 				<div class="ui segment content gt-my-0">
 					<div class="field">
-						<input name="title" id="issue_title" placeholder="{{.locale.Tr "repo.milestones.title"}}" value="{{if .TitleQuery}}{{.TitleQuery}}{{else if .IssueTemplateTitle}}{{.IssueTemplateTitle}}{{else}}{{.title}}{{end}}" tabindex="3" autofocus required maxlength="255" autocomplete="off">
+						<input name="title" id="issue_title" placeholder="{{.locale.Tr "repo.milestones.title"}}" value="{{if .TitleQuery}}{{.TitleQuery}}{{else if .IssueTemplateTitle}}{{.IssueTemplateTitle}}{{else}}{{.title}}{{end}}" autofocus required maxlength="255" autocomplete="off">
 						{{if .PageIsComparePull}}
 							<div class="title_wip_desc" data-wip-prefixes="{{JsonUtils.EncodeToString .PullRequestWorkInProgressPrefixes}}">{{.locale.Tr "repo.pulls.title_wip_desc" (index .PullRequestWorkInProgressPrefixes 0| Escape) | Safe}}</div>
 						{{end}}
@@ -35,7 +35,7 @@
 						{{template "repo/issue/comment_tab" .}}
 					{{end}}
 					<div class="text right">
-						<button class="ui green button" tabindex="6">
+						<button class="ui green button">
 							{{if .PageIsComparePull}}
 								{{.locale.Tr "repo.pulls.create"}}
 							{{else}}
diff --git a/templates/repo/issue/view_content/sidebar.tmpl b/templates/repo/issue/view_content/sidebar.tmpl
index c150a9cdcd..ff4239bbb7 100644
--- a/templates/repo/issue/view_content/sidebar.tmpl
+++ b/templates/repo/issue/view_content/sidebar.tmpl
@@ -621,7 +621,7 @@
 						</div>
 
 						<div class="field">
-							<div class="ui fluid dropdown selection" tabindex="0">
+							<div class="ui fluid dropdown selection">
 
 								<select name="reason">
 									<option value=""> </option>
diff --git a/templates/repo/settings/options.tmpl b/templates/repo/settings/options.tmpl
index 012368fb94..418a80e831 100644
--- a/templates/repo/settings/options.tmpl
+++ b/templates/repo/settings/options.tmpl
@@ -315,13 +315,13 @@
 				<div class="field{{if not $isWikiEnabled}} disabled{{end}}" id="wiki_box">
 					<div class="field">
 						<div class="ui radio checkbox{{if $isWikiGlobalDisabled}} disabled{{end}}"{{if $isWikiGlobalDisabled}} data-tooltip-content="{{.locale.Tr "repo.unit_disabled"}}"{{end}}>
-							<input class="enable-system-radio" tabindex="0" name="enable_external_wiki" type="radio" value="false" data-target="#external_wiki_box" {{if not (.Repository.UnitEnabled $.Context $.UnitTypeExternalWiki)}}checked{{end}}>
+							<input class="enable-system-radio" name="enable_external_wiki" type="radio" value="false" data-target="#external_wiki_box" {{if not (.Repository.UnitEnabled $.Context $.UnitTypeExternalWiki)}}checked{{end}}>
 							<label>{{.locale.Tr "repo.settings.use_internal_wiki"}}</label>
 						</div>
 					</div>
 					<div class="field">
 						<div class="ui radio checkbox{{if $isExternalWikiGlobalDisabled}} disabled{{end}}"{{if $isExternalWikiGlobalDisabled}} data-tooltip-content="{{.locale.Tr "repo.unit_disabled"}}"{{end}}>
-							<input class="enable-system-radio" tabindex="0" name="enable_external_wiki" type="radio" value="true" data-target="#external_wiki_box" {{if .Repository.UnitEnabled $.Context $.UnitTypeExternalWiki}}checked{{end}}>
+							<input class="enable-system-radio" name="enable_external_wiki" type="radio" value="true" data-target="#external_wiki_box" {{if .Repository.UnitEnabled $.Context $.UnitTypeExternalWiki}}checked{{end}}>
 							<label>{{.locale.Tr "repo.settings.use_external_wiki"}}</label>
 						</div>
 					</div>
@@ -348,7 +348,7 @@
 				<div class="field {{if not $isIssuesEnabled}}disabled{{end}}" id="issue_box">
 					<div class="field">
 						<div class="ui radio checkbox{{if $isIssuesGlobalDisabled}} disabled{{end}}"{{if $isIssuesGlobalDisabled}} data-tooltip-content="{{.locale.Tr "repo.unit_disabled"}}"{{end}}>
-							<input class="enable-system-radio" tabindex="0" name="enable_external_tracker" type="radio" value="false" data-context="#internal_issue_box" data-target="#external_issue_box" {{if not (.Repository.UnitEnabled $.Context $.UnitTypeExternalTracker)}}checked{{end}}>
+							<input class="enable-system-radio" name="enable_external_tracker" type="radio" value="false" data-context="#internal_issue_box" data-target="#external_issue_box" {{if not (.Repository.UnitEnabled $.Context $.UnitTypeExternalTracker)}}checked{{end}}>
 							<label>{{.locale.Tr "repo.settings.use_internal_issue_tracker"}}</label>
 						</div>
 					</div>
@@ -380,7 +380,7 @@
 					</div>
 					<div class="field">
 						<div class="ui radio checkbox{{if $isExternalTrackerGlobalDisabled}} disabled{{end}}"{{if $isExternalTrackerGlobalDisabled}} data-tooltip-content="{{.locale.Tr "repo.unit_disabled"}}"{{end}}>
-							<input class="enable-system-radio" tabindex="0" name="enable_external_tracker" type="radio" value="true" data-context="#internal_issue_box" data-target="#external_issue_box" {{if .Repository.UnitEnabled $.Context $.UnitTypeExternalTracker}}checked{{end}}>
+							<input class="enable-system-radio" name="enable_external_tracker" type="radio" value="true" data-context="#internal_issue_box" data-target="#external_issue_box" {{if .Repository.UnitEnabled $.Context $.UnitTypeExternalTracker}}checked{{end}}>
 							<label>{{.locale.Tr "repo.settings.use_external_issue_tracker"}}</label>
 						</div>
 					</div>
@@ -523,7 +523,7 @@
 							<p>
 								{{.locale.Tr "repo.settings.default_merge_style_desc"}}
 							</p>
-							<div class="ui dropdown selection" tabindex="0">
+							<div class="ui dropdown selection">
 								<select name="pulls_default_merge_style">
 									<option value="merge" {{if or (not $pullRequestEnabled) (eq $prUnit.PullRequestsConfig.DefaultMergeStyle "merge")}}selected{{end}}>{{.locale.Tr "repo.pulls.merge_pull_request"}}</option>
 									<option value="rebase" {{if or (not $pullRequestEnabled) (eq $prUnit.PullRequestsConfig.DefaultMergeStyle "rebase")}}selected{{end}}>{{.locale.Tr "repo.pulls.rebase_merge_pull_request"}}</option>
diff --git a/templates/repo/settings/webhook/settings.tmpl b/templates/repo/settings/webhook/settings.tmpl
index e22b3da7ab..d84c8eb110 100644
--- a/templates/repo/settings/webhook/settings.tmpl
+++ b/templates/repo/settings/webhook/settings.tmpl
@@ -31,7 +31,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="create" type="checkbox" tabindex="0" {{if .Webhook.Create}}checked{{end}}>
+					<input name="create" type="checkbox" {{if .Webhook.Create}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_create"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_create_desc"}}</span>
 				</div>
@@ -41,7 +41,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="delete" type="checkbox" tabindex="0" {{if .Webhook.Delete}}checked{{end}}>
+					<input name="delete" type="checkbox" {{if .Webhook.Delete}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_delete"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_delete_desc"}}</span>
 				</div>
@@ -51,7 +51,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="fork" type="checkbox" tabindex="0" {{if .Webhook.Fork}}checked{{end}}>
+					<input name="fork" type="checkbox" {{if .Webhook.Fork}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_fork"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_fork_desc"}}</span>
 				</div>
@@ -61,7 +61,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="push" type="checkbox" tabindex="0" {{if .Webhook.Push}}checked{{end}}>
+					<input name="push" type="checkbox" {{if .Webhook.Push}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_push"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_push_desc"}}</span>
 				</div>
@@ -71,7 +71,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="repository" type="checkbox" tabindex="0" {{if .Webhook.Repository}}checked{{end}}>
+					<input name="repository" type="checkbox" {{if .Webhook.Repository}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_repository"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_repository_desc"}}</span>
 				</div>
@@ -81,7 +81,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="release" type="checkbox" tabindex="0" {{if .Webhook.Release}}checked{{end}}>
+					<input name="release" type="checkbox" {{if .Webhook.Release}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_release"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_release_desc"}}</span>
 				</div>
@@ -91,7 +91,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="package" type="checkbox" tabindex="0" {{if .Webhook.Package}}checked{{end}}>
+					<input name="package" type="checkbox" {{if .Webhook.Package}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_package"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_package_desc"}}</span>
 				</div>
@@ -102,7 +102,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="wiki" type="checkbox" tabindex="0" {{if .Webhook.Wiki}}checked{{end}}>
+					<input name="wiki" type="checkbox" {{if .Webhook.Wiki}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_wiki"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_wiki_desc"}}</span>
 				</div>
@@ -117,7 +117,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="issues" type="checkbox" tabindex="0" {{if .Webhook.Issues}}checked{{end}}>
+					<input name="issues" type="checkbox" {{if .Webhook.Issues}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_issues"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_issues_desc"}}</span>
 				</div>
@@ -127,7 +127,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="issue_assign" type="checkbox" tabindex="0" {{if .Webhook.IssueAssign}}checked{{end}}>
+					<input name="issue_assign" type="checkbox" {{if .Webhook.IssueAssign}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_issue_assign"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_issue_assign_desc"}}</span>
 				</div>
@@ -137,7 +137,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="issue_label" type="checkbox" tabindex="0" {{if .Webhook.IssueLabel}}checked{{end}}>
+					<input name="issue_label" type="checkbox" {{if .Webhook.IssueLabel}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_issue_label"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_issue_label_desc"}}</span>
 				</div>
@@ -147,7 +147,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="issue_milestone" type="checkbox" tabindex="0" {{if .Webhook.IssueMilestone}}checked{{end}}>
+					<input name="issue_milestone" type="checkbox" {{if .Webhook.IssueMilestone}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_issue_milestone"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_issue_milestone_desc"}}</span>
 				</div>
@@ -157,7 +157,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="issue_comment" type="checkbox" tabindex="0" {{if .Webhook.IssueComment}}checked{{end}}>
+					<input name="issue_comment" type="checkbox" {{if .Webhook.IssueComment}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_issue_comment"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_issue_comment_desc"}}</span>
 				</div>
@@ -172,7 +172,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="pull_request" type="checkbox" tabindex="0" {{if .Webhook.PullRequest}}checked{{end}}>
+					<input name="pull_request" type="checkbox" {{if .Webhook.PullRequest}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_pull_request"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_pull_request_desc"}}</span>
 				</div>
@@ -182,7 +182,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="pull_request_assign" type="checkbox" tabindex="0" {{if .Webhook.PullRequestAssign}}checked{{end}}>
+					<input name="pull_request_assign" type="checkbox" {{if .Webhook.PullRequestAssign}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_pull_request_assign"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_pull_request_assign_desc"}}</span>
 				</div>
@@ -192,7 +192,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="pull_request_label" type="checkbox" tabindex="0" {{if .Webhook.PullRequestLabel}}checked{{end}}>
+					<input name="pull_request_label" type="checkbox" {{if .Webhook.PullRequestLabel}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_pull_request_label"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_pull_request_label_desc"}}</span>
 				</div>
@@ -202,7 +202,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="pull_request_milestone" type="checkbox" tabindex="0" {{if .Webhook.PullRequestMilestone}}checked{{end}}>
+					<input name="pull_request_milestone" type="checkbox" {{if .Webhook.PullRequestMilestone}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_pull_request_milestone"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_pull_request_milestone_desc"}}</span>
 				</div>
@@ -212,7 +212,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="pull_request_comment" type="checkbox" tabindex="0" {{if .Webhook.PullRequestComment}}checked{{end}}>
+					<input name="pull_request_comment" type="checkbox" {{if .Webhook.PullRequestComment}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_pull_request_comment"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_pull_request_comment_desc"}}</span>
 				</div>
@@ -222,7 +222,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="pull_request_review" type="checkbox" tabindex="0" {{if .Webhook.PullRequestReview}}checked{{end}}>
+					<input name="pull_request_review" type="checkbox" {{if .Webhook.PullRequestReview}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_pull_request_review"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_pull_request_review_desc"}}</span>
 				</div>
@@ -232,7 +232,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="pull_request_sync" type="checkbox" tabindex="0" {{if .Webhook.PullRequestSync}}checked{{end}}>
+					<input name="pull_request_sync" type="checkbox" {{if .Webhook.PullRequestSync}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_pull_request_sync"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_pull_request_sync_desc"}}</span>
 				</div>
@@ -242,7 +242,7 @@
 		<div class="seven wide column">
 			<div class="field">
 				<div class="ui checkbox">
-					<input name="pull_request_review_request" type="checkbox" tabindex="0" {{if .Webhook.PullRequestReviewRequest}}checked{{end}}>
+					<input name="pull_request_review_request" type="checkbox" {{if .Webhook.PullRequestReviewRequest}}checked{{end}}>
 					<label>{{.locale.Tr "repo.settings.event_pull_request_review_request"}}</label>
 					<span class="help">{{.locale.Tr "repo.settings.event_pull_request_review_request_desc"}}</span>
 				</div>
@@ -254,7 +254,7 @@
 <!-- Branch filter -->
 <div class="field">
 	<label for="branch_filter">{{.locale.Tr "repo.settings.branch_filter"}}</label>
-	<input name="branch_filter" type="text" tabindex="0" value="{{or .Webhook.BranchFilter "*"}}">
+	<input name="branch_filter" type="text" value="{{or .Webhook.BranchFilter "*"}}">
 	<span class="help">{{.locale.Tr "repo.settings.branch_filter_desc" | Str2html}}</span>
 </div>
 
@@ -271,7 +271,7 @@
 
 <div class="inline field">
 	<div class="ui checkbox">
-		<input name="active" type="checkbox" tabindex="0" {{if or $isNew .Webhook.IsActive}}checked{{end}}>
+		<input name="active" type="checkbox" {{if or $isNew .Webhook.IsActive}}checked{{end}}>
 		<label>{{.locale.Tr "repo.settings.active"}}</label>
 		<span class="help">{{.locale.Tr "repo.settings.active_helper"}}</span>
 	</div>
diff --git a/templates/user/dashboard/navbar.tmpl b/templates/user/dashboard/navbar.tmpl
index 0aa6e4b162..0c185807c1 100644
--- a/templates/user/dashboard/navbar.tmpl
+++ b/templates/user/dashboard/navbar.tmpl
@@ -11,7 +11,7 @@
 					</span>
 					{{svg "octicon-triangle-down" 14 "dropdown icon"}}
 				</span>
-				<div class="context user overflow menu" tabindex="-1">
+				<div class="context user overflow menu">
 					<div class="ui header">
 						{{.locale.Tr "home.switch_dashboard_context"}}
 					</div>
@@ -55,7 +55,7 @@
 						{{end}}
 						{{svg "octicon-triangle-down" 14 "dropdown icon"}}
 					</span>
-					<div class="context user overflow menu" tabindex="-1">
+					<div class="context user overflow menu">
 						<div class="ui header">
 							{{.locale.Tr "home.filter_by_team_repositories"}}
 						</div>
diff --git a/web_src/js/components/DiffCommitSelector.vue b/web_src/js/components/DiffCommitSelector.vue
index e24619dc08..283ef03ab9 100644
--- a/web_src/js/components/DiffCommitSelector.vue
+++ b/web_src/js/components/DiffCommitSelector.vue
@@ -6,7 +6,6 @@
       @click.stop="toggleMenu()"
       :data-tooltip-content="locale.filter_changes_by_commit"
       aria-haspopup="true"
-      tabindex="0"
       aria-controls="diff-commit-selector-menu"
       :aria-label="locale.filter_changes_by_commit"
       aria-activedescendant="diff-commit-list-show-all"
@@ -15,7 +14,7 @@
     </button>
     <div class="menu left transition" id="diff-commit-selector-menu" :class="{visible: menuVisible}" v-show="menuVisible" v-cloak :aria-expanded="menuVisible ? 'true': 'false'">
       <div class="loading-indicator is-loading" v-if="isLoading"/>
-      <div v-if="!isLoading" class="vertical item gt-df gt-fc gt-gap-2" id="diff-commit-list-show-all" role="menuitem" tabindex="-1" @keydown.enter="showAllChanges()" @click="showAllChanges()">
+      <div v-if="!isLoading" class="vertical item gt-df gt-fc gt-gap-2" id="diff-commit-list-show-all" role="menuitem" @keydown.enter="showAllChanges()" @click="showAllChanges()">
         <div class="gt-ellipsis">
           {{ locale.show_all_commits }}
         </div>
@@ -25,7 +24,7 @@
       </div>
       <!-- only show the show changes since last review if there is a review AND we are commits ahead of the last review -->
       <div
-        v-if="lastReviewCommitSha != null" role="menuitem" tabindex="-1"
+        v-if="lastReviewCommitSha != null" role="menuitem"
         class="vertical item gt-df gt-fc gt-gap-2 gt-border-secondary-top"
         :class="{disabled: commitsSinceLastReview === 0}"
         @keydown.enter="changesSinceLastReviewClick()"
@@ -41,7 +40,7 @@
       <span v-if="!isLoading" class="info gt-border-secondary-top text light-2">{{ locale.select_commit_hold_shift_for_range }}</span>
       <template v-for="commit in commits" :key="commit.id">
         <div
-          class="vertical item gt-df gt-gap-2 gt-border-secondary-top" role="menuitem" tabindex="-1"
+          class="vertical item gt-df gt-gap-2 gt-border-secondary-top" role="menuitem"
           :class="{selection: commit.selected, hovered: commit.hovered}"
           @keydown.enter.exact="commitClicked(commit.id)"
           @keydown.enter.shift.exact="commitClickedShift(commit)"