What's your favorite browser extension?

Damn i was going for ad-blocker -.-
(DonwloadThemAll actually pretty usefull)

I guess Greasemonkey?

I use a lot of extension.

Most helpful one is Session Manager for now.

I think Steam Inventory Helper,helped me a lot to buy and sell a lot of cards and items

1. Search by Image (by Google)
2. TinEye Reverse Image Search
3. SmoothScroll

Something like that.

NoSquint

Stylish, gotta have dem dark web themes. Autocopy close second.

Stylish because I need those black backgrounds.

mouse gestures if you are not in opera

i use a google translate extension all the time

I don't have any!

Magic Actions for YouTube,Enhanced Steam,Stylish.

Stylish and Session Manager.
Lightshot too, though. So hard to choose. -_-

Noone is saying Imagus?

The best extension by far, you just have to hover your mouse on a picture to see it.

I dunno.. PixelPerfect for work))

Outside of adblock? Then I will have to say adblock. Lol, seriously though, firefox doesn't have enhanced steam anymore. Something about the author being a pussy and not going through some kind of verification process every time the extension or firefox (I don't remember which) updated to get it into the firefox "store". So, I use Steam Database which is pretty good (not as good as enhanced steam, but oh well) and I like New Tab Tools a lot as well. All for firefox, of course.

tabs outliner

uBlock Origin + uMatrix + Google Data Saver (compressed non-https data, thus saving me a lot of bandwidth on my very poor connection)

stylish, grease/tampermonkey, enhanced steam, steam inventory helper :3

zenmate

In the order which I use them the most
ProxFlow (damn Germany blocking nearly every youtube video because of some songs, this addon helps a lot with that but if anyone knows any better one it would be nice mainly because it still hides videos from channels if they are blocked)
grease/tampermonkey
enchanced steam
Gmail Notifier
I've also got steam inventory helper but haven't used it for anything lol

Lots of people saying Stylish. I'm going to check that out.

Flashblock
Linkification

Enhanced Steam
ReChat for Twitch™
Stop Video Download For YouTube
WEB.DE MailCheck