Seems to do most of what it claims, but on Youtube it doesn't filter out the recommended videos that show in the sidebar while watching a video
How I reproduced this:
- Opened a private window with only this extension running
- Logged in to my yt account and selected a video
- Chose a video from the recommended list and took a keyword from its title
- Added it to the filtered keywords (both matching case and not matching case) and refreshed
- Beheld the unchanged list, with the targeted video still alive and well

Would be awesome if this could be added / fixed, i've been looking for something to avoid silksong spoilers and this was SO CLOSE to being perfect

Works great on YT (where I mainly want it). Thanks for making a FF version of the add-on so quickly.