files/en-us/mozilla/add-ons/webextensions/manifest.json/options_page/index.md
Use the options_page key to define an options page that opens in a new tab. You use this page to enable users to modify your extension's settings.
The way the user opens the page is browser-dependent. In Firefox, the page opens when the extension's icon is clicked. Your extension can also open the page using {{WebExtAPIRef("runtime.openOptionsPage()")}}.
Alternatively, you can use the options_ui key with open_in_tab set to true. If options_ui is specified, options_page is ignored.
See options_ui for more information on developing a settings page.
"options_page": "options/options.html"
{{Compat}}