yee

The extension basically stops firefox from working. With the extension enabled, pages start loading when I open firefox, but stop half-way through. No new pages can be loaded.
This might be correlated with me being behind a proxy, but without the extension, firefox workes fine.

Liking it better and better

I love the idea of this, but recently (2/2020) it hasn't been working. Facebook still loads in the container, with a white bar underneath. But it is definitely still seeing my search history in other containers. I'm getting ads about quitting smoking.
I have never smoked. But yesterday I did a lot of research on rehabilitation from drug misuse for a character in my novel. This is the only time I can think of that I even approached the topic of drugs or addiction on my computer. But facebook knows, despite being in a container. :(

AWESOME ! Firefox sounds to secure privacy far more over than FB ! Thanks and congratulations to Mozilla

GREAT ! AWESOME ! LOVE it !

For a long time, Leaking and menacing on TRUST, i can't help nothing to do.

Privacy is one of the main reasons to use Firefox, and Facebook Container is one of the main private features of the browser. But today Facebook Container works wrong if you also use Side View. So if you want to use Firefox for Instagram, it could be a serious problem for you.

awsome

I tried to add it. When I clicked the "Add to Firefox" button this pop up appeared, "Installation aborted because the add-on appears to be corrupt.". It appears the FB IT folks (FB is owned by the NSA, CIA or FBI Spooks) torpedoed your attempt to block them. Nah, I'm just being paranoid again, they wouldn't do that :-(.