[redbackthomson]

Hmm that's strange. Perhaps you have two Google accounts with different subscriptions? When you sign in I grab your subscribed channels and that's what I send when you categorise. You can check the "Subscriptions" page to see exactly what data we pulled.

I did say Chrome browser because with the deprecation of manifest v2, I had to make a choice about which to support. I decided given Chrome's larger market share that it would benefit the most people sooner. However I'm building it in such a way that porting to Firefox shouldn't require much additional work.

[Timwi]

I do have multiple YouTube accounts (channels) under one Google account. I initially logged in as one YouTube channel of mine that I wanted to categorize. Only then did I find out that it looks at subscriptions. So I logged out and logged back in as my main account which is subscribed to the other one. Then I hit the problem.

[redbackthomson]

Hmm okay. Maybe some wires got crossed in the back end. Perhaps Google OAuth doesn't distinguish between accounts and associated both sets of subscriptions with the same user? Interesting