The browser tab is blank, and unless I'm doing something wrong there is no Favicon set for Lemmy.World. I would hazard a guess that most of us have lots and lots of tabs open at any given time. Would it be possible to add an icon to help make it easier to locate lemmy.world tabs?
You can check the Network tab in the Developer Tools, this is the image I'm getting served as favicon: https://lemmy.world/pictrs/image/66ca36df-4ada-47b3-9169-01870d8fb0ac.png
If something is bloking it it should say it in the Transferred column. I had to tweak some addons to make it work.
I see it there, in transferred, it shows service worker. Everything appears to be working. If I may, what did you have to tweak to make it work because I do have a lot of extensions and userscripts running.
I'm the person who reported that. As a temporary workaround I'm using the Favicon Switcher extension (with a smaller file). You have to do it per Firefox instance; the settings aren't synced.