Bug 1867378 - Pt.3. Update the test manifest for Add-ons Manager tabp…

…anel cases that are passing a11y-checks. r=extension-reviewers,zombie

When the D195198 would be ready to land, there are a few tests that are going to be passing all a11y-checks since the AccessibilityUtils would be able to automatically check focusable tabs in tablists (that were previously failing these tests) or some of them, thus we need to update the manifest to remove `fail-if`  notations when appropriate and update the comments in the remaining tests

Depends on D195745

Differential Revision: https://phabricator.services.mozilla.com/D197025

toolkit/mozapps/extensions/test/browser/browser.toml

@@ -76,13 +76,12 @@ skip-if = ["true"] # Bug 1626824
 ["browser_file_xpi_no_process_switch.js"]
 
 ["browser_globalwarnings.js"]
-fail-if = ["a11y_checks"] # Bug 1854646 clicked div.addon-name-container, button.category may not be focusable
+fail-if = ["a11y_checks"] # Bug 1854646 clicked div.addon-name-container may not be focusable
 
 ["browser_gmpProvider.js"]
-fail-if = ["a11y_checks"] # Bug 1854646 clicked div.addon-name-container, button.category, div.card.addon, div.container may not be focusable
+fail-if = ["a11y_checks"] # Bug 1854646 clicked div.addon-name-container and div.card.addon may not be focusable
 
 ["browser_history_navigation.js"]
-fail-if = ["a11y_checks"] # Bug 1854646 clicked button.category may not be focusable
 https_first_disabled = true
 
 ["browser_html_abuse_report.js"]
@@ -92,17 +91,15 @@ support-files = ["head_abuse_report.js"]
 support-files = ["head_abuse_report.js"]
 
 ["browser_html_detail_permissions.js"]
-fail-if = ["a11y_checks"] # Bug 1854646 clicked button#details-deck-button-permissions may not be focusable
 
 ["browser_html_detail_view.js"]
-fail-if = ["a11y_checks"] # Bug 1854646 clicked div.addon-name-container, button.category may not be focusable
+fail-if = ["a11y_checks"] # Bug 1854646 clicked div.addon-name-container may not be focusable
 
 ["browser_html_discover_view.js"]
 https_first_disabled = true
 support-files = ["head_disco.js"]
 
 ["browser_html_discover_view_clientid.js"]
-fail-if = ["a11y_checks"] # Bug 1854646 clicked button.category may not be focusable
 
 ["browser_html_discover_view_prefs.js"]
 
@@ -115,26 +112,24 @@ skip-if = ["a11y_checks"] # Bug 1858037 to investigate intermittent a11y_checks
 ["browser_html_message_bar.js"]
 
 ["browser_html_options_ui.js"]
-fail-if = ["a11y_checks"] # Bug 1854646 clicked button.details-deck-button-details, button.details-deck-button-preferences may not be focusable
 
 ["browser_html_options_ui_in_tab.js"]
 
 ["browser_html_pending_updates.js"]
-fail-if = ["a11y_checks"] # Bug 1854646 clicked div.text-container, button.category may not be focusable
+fail-if = ["a11y_checks"] # Bug 1854646 clicked div.text-container may not be focusable
 
 ["browser_html_recent_updates.js"]
 
 ["browser_html_recommendations.js"]
 https_first_disabled = true
 
 ["browser_html_scroll_restoration.js"]
-fail-if = ["a11y_checks"] # Bug 1854646 clicked button#details-deck-button-permissions may not be focusable
 skip-if = ["os == 'mac' && verify && debug"] # Bug 1850159
 
 ["browser_html_sitepermission_addons.js"]
 
 ["browser_html_updates.js"]
-fail-if = ["a11y_checks"] # Bug 1854646 clicked div, button.details-deck-button-details, button.details-deck-button-release-notes, button.category may not be focusable
+fail-if = ["a11y_checks"] # Bug 1854646 clicked div may not be focusable
 https_first_disabled = true
 
 ["browser_html_warning_messages.js"]
@@ -150,7 +145,7 @@ https_first_disabled = true
 ["browser_manage_shortcuts_hidden.js"]
 
 ["browser_manage_shortcuts_remove.js"]
-fail-if = ["a11y_checks"] # Bug 1854646 clicked element may not be focusable
+fail-if = ["a11y_checks"] # Bug 1854646 clicked button.shortcut-remove-button may not be labeled
 
 ["browser_menu_button_accessibility.js"]