@jvariance yes, for the most part, extensions that aimed at affecting the contents of a website doesn't work on the "active" tab
already notice Bitwarden and Youtube Enhancer, there might be even more

Extension can't detect and is not working well on the website of the activated tab
Example:

• Bitwarden: Doesn't know what website is currently on which tab, using it by clicking on the icon of the extension or using context menu gives the account on the website of other tabs
  I'm on Opera, but it gives accounts from Danbooru
  

Missing Discord from sidebar