I use the Stylus extension to make every website I visit use the same font and text size.
Fuck you, designers!
Which font do you use?
In the browser it’s defined as “system-ui”, which inherits whatever the OS uses as it’s default font. So web pages look the same as apps.
My OS uses the font called “Ubuntu”.
Cringe
Indie Wiki Buddy helps you easily find and support independent wikis you might otherwise miss in search results. When you visit a wiki on Fandom, this extension will notify or automatically redirect you to quality independent wikis when they’re available.
Wii Shop Music extension. It plays Nintendo Shop Music if you visit Shopping sites. Sadly the original is down but there is a backup on Internet Archive: https://web.archive.org/web/20230910224936/https://addons.mozilla.org/de/firefox/addon/wii-shop-channel/
Cloud to butt plus
Tabliss. In my case it’s just an empty page with “good morning” or whatever text depending on the current time of day.
Tabliss
BetterTTV, FrankerFaceZ and 7TV
GNU Terry Pratchett