Tree Style Tabs is a must for me. It makes the tab/tab goup functionality in other browsers feel awful.

Is there anything that disables / stops sticky videos when scrolling on mobile?

I get pissed off when I'm reading a news article, scroll down, and their headline video (often just an ad) clips itself to the top 1/3 of the screen.

AdNauseam. An AdBlocker that also creates a trail of Garbage Data to make users less valuable for Advertisers and Data Collection

Tab Session Manager

In general:

• Bypass Paywalls
• Dark Reader
• HTTPS Everywhere
• I don't care about Cookies
• Karrinator
• KeePassXC Browser
• NoScript
• Simple Tab Groups
• Tampermonkey
• UBlock
• UnloadTabs (Vor allem für Müll wie MS Teams)
• User Agent Switcher and Manager
• Vencord
• Video Download Helper

For YouTube:

• AutoReplay for YouTube
• Disable YouTube Seek by Number
• Return YouTube Dislike
• SponsorBlock

Most of those Addons are for me to not go insane or blind.

Others have already mentioned some excellent vertical tab add-ons, so I'll post Tabs Aside, which is a super convenient way to save and load a window full of tabs. Saves having like 20 windows open with different stuff you don't want to lose.

Lots of great extensions have been listed already, but here's one that I haven't seen mentioned yet and I really like: https://unhook.app/

Aside from the popular ublock origin I'd get Sponsor Block. Too bad my mobile version doesn't support it.

Tab Stash.

uBlock Origin and Mouse Gestures.

Literally all I have ever used. I love mouse gestures so much because of Opera. I was using that for a bit before I discovered Firefox back in the day.