When clicking on the addons that are displayed at the right side of the tab bar, a new tab opens instead of the menu of the addon.
Some addons allow you to click on them to enable or disable them or change some options, for example Dark Reader let's you change the theme of a page.

(I would also like window buttons to minimize, maximize or close the window, but right now I can do that with keyboard shortcuts)
When clicking on the addons that are displayed at the right side of the tab bar, a new tab opens instead of the menu of the addon.

Some addons allow you to click on them to enable or disable them or change some options, for example Dark Reader let's you change the theme of a page.
(I would also like window buttons to minimize, maximize or close the window, but right now I can do that with keyboard shortcuts)