This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
options_page key to define an options page for your extension.
The options page contains settings for the extension. The user can access it from the browser's add-ons manager, and you can open it from within your extension using
Unlike options pages specified using the newer
options_ui key, options pages specified using the deprecated
options_page key don't receive browser styles and always open in a normal browser tab.
BCD tables only load in the browser