If you're one of the persons for whom FB Container slows down and/or breaks some websites, I'll mention it to help: there may be an incompatibility with another family of extensions, the ones that autofill the cookie banners to dismiss cookies.

And, in that case, simply switch to another cookie autorefuser extension, there are multiple ones, like Idon'tcareaboutcookies, ninja cookie, etc.

شكرا