What are the names for "Add Tab to New Group" and "Open in New Container Tab" in userChrome.css ?
Is there list to get the names for menus to find them and remove with:
Setting in about:config the parameter toolkit.legacyUserProfileCustomizations.stylesheets
as true, then editing userChrome.css file in %APPDATA%\Mozilla\Firefox\Profiles\[profile-id]\chrome adding #necessary-parameter-name { display:none !important; }?
Because now Firefox is not allowing any editing of the menus by addons.
