Github repo is public now, in case something like that happens in future or if anyone is willing to contribute. It's kinda old so apologies in advance.
https://github.com/MilesVII/621watched

list said:
Another thing to add to known issues;

If a tag is aliased after you start watching it you can no longer tell from the tags on the image page which tag caused it to be included in the watch list.

Example you were subscribed to night_time but it's been aliased to night it shows night_time in search and in the extension but it shows night on the page so the extension can't recognize it to mark it as a subscribed tag.

I had this concern when making it, but didn't come up with a way to track and reflect these changes easily.

Looks like the new UI broke the addon :[

dotheetika said:
Looks like the new UI broke the addon :[

I submitted a fix on the new GitHub repo, but if anyone wants to fix it themselves, you change line 88 of combatfox.js from:

document.getElementById("nav").appendChild(bar.element);

to

document.querySelector(".navigation").appendChild(bar.element);

swiggityswoogiter said:
I submitted a fix on the new GitHub repo

Thanks, merged, also updated manifest version to comply with CWS. 2.2.0 available for both Firefox and Chrome browsers

It looks like the the new UI change kicked the "OwO/XwX" button off the tags list under the search bar. I made sure the "Hide Subscription Button" option was unchecked in the settings. Can anyone confirm this?

rhyslyka said:
It looks like the the new UI change kicked the "OwO/XwX" button off the tags list under the search bar. I made sure the "Hide Subscription Button" option was unchecked in the settings. Can anyone confirm this?

Yup. the OwO/XwX button is not existing for now. Hope it will get fixed soon.

Apologies for the delay, fixed the buttons in version 2.2.1, pending review

The OwO button is back and looks like it's working. Funny that it's on the right side of the tag now. Weird thing is that it appears to treat artist tags with the checkmark next to it (meaning "Uploaded by the artist") as a different tag than the artist's tag itself. It only happens when I open a post with that checkmark present. I think this was also part of the UI change? Like I'd click on the artist's tag, go to their page, and it would show XwX. But go to their post, with that checkmark in their name, and it would show OwO. When I click on the OwO for the checkmarked tag, it shows up as "[artist's tag] Uploaded by the artist" in the watchlist. So now I guess I can follow the same artist twice?

rhyslyka said:
Weird thing is that it appears to treat artist tags with the checkmark next to it (meaning "Uploaded by the artist") as a different tag than the artist's tag itself

Ah heck, my bad, i'll fix that shortly, but would ask for an example of a post with checkmark if possible, didn't manage to find it quickly.
And yep, I moved it to the right intentionally, looked less cramped to me

np! and here's one such post i found: https://e621.net/posts/5477873

rhyslyka said:
np! and here's one such post i found

Thanks! Should be fixed in 2.3.0, available for Firefox, pending review on CWS. There are minor changes regarding how tags with spaces are treated which I didn't manage to avoid, but both versions are compatible and work fine.
I also remade the popup window: mostly refactoring, with minor appearance changes. Shouldn't affect functionality, but I'll try to fix any issues asap should there be any, just let me know.

I'm also surprised there are ~20 users on Firefox Android (and about a thousand in general), must be the Fennec users. AMO makes me click the Android version checkbox each time I upload, so I thought I shouldn't really check it, but I'm glad I actually did =D

it appears that spaces in tags break the OwO button. They still show up in watched so i think it's just the button. i can now subscribe to both vesper art and vesper_art.

rhyslyka said:
it appears that spaces in tags break the OwO button. They still show up in watched so i think it's just the button. i can now subscribe to both vesper art and vesper_art.

Yeah, I noticed that. I didn't want to bother casting tag names between spaces and low dashes so i left it as is after making sure they function identically.
Now that I think about it, I'm just being stupid and should have fixed it easily. Will do with next refactor soon, for now I suggest removing old tags manually via backup menu and resubscribing or just leaving them as is.