You'been answered already about the support periods in Android, but let me add more for you (and others mentioning support times of the system): in Android this problem doesn't exist to begin with. The fact that getting a new web browser version is anchored to getting a whole new operating system version, is preposterous and absurd, pure planned obsolescence from Apple. You would just upgrade your Chrome, Brave, Firefox, or whatever browser app, and do with them what your were trying to do. (in this case install a browser extension, for which the best one qould be Firefox).

This situation with iOS sounds as ridiculous as if it was mandatory to upgrade from Windows 10 to Windows 11 in order to update the Edge browser. (Edited to remove useless rant)