Extensions works but its got a very annoying habit of losing my settings. It would be nice if the default is sensible like including blocking sponsored posts for a start.

I am looking at switching to PB Purity because its default block sponsored posts.

I'd never use facebook without this extension.

Since today sponsored posts are visible again, even though I have the filter turned on.

One of the best add-ins I know of. The only reason why it did not earn (yet) five stars from me, is because of a) the updates could occur more often (although it's still good for donateware); and b) saving and restoring your preferences/settings requires quite a few mouse clicks. The latter is required if you use this software on many computers instead of just one a and want the latest settings on all computers.

Is there a way to force a Kanji? because facebook treat it as a "special character"

I have used this extension for years and won't go on Facebook without it. It is, without doubt, the only way to make Facebook palatable in my opinion. I can keep out political posts or racist posts, all with a few keystrokes. A must have for me.