On Android, Firefox supports addons (but practically no one knows they exist) and Chrome doesn't have extensions.
Are there other options? I hope I'm wrong here since it would be great to have browser plugins on mobile!
I have varying level of success installing other addons. For example, Tab Count addon works. I can install LastPass on mobile but there is no way to use it as it goes blank on login screen. I assume that, mostly the developers are not aware that the addon may be used on mobile too.
For those who are wondering why I would need a Tab Count extension on Android Firefox, when the tab count exceeds 99, the ui shows an infinity symbol. Yes, I have that many tabs, I had more than 200 tabs open at one point and android firefox kept chugging along like it was nothing. I am trying to reduce the count for my own sanity. Currently, tamed it to a more docile 44.
It would be most useful to do this in a dynamic way though. I might actually want to know that examplewebsite.com has an app that I could download. But once I've gone to that site 5 times, then the banner should be hidden. Either I don't want the app, or I've already downloaded it. Unfortunately, I don't think content blockers can include any logic like this.