On the site mostly real mouse is hidden and it change to a fake mouse, and this fake mouse force to full-screen. You can leave fullscreen, but then the behavior starts all over again. (rightclick is also disabled on this site).
Or shoud i better make for every found extension on such site behavior make a new bug report?
If it looks like the same kind of behavior or author, it is sufficient to mention further guids you find here. Thanks for providing these reports!
Add-ons are running remote scripts from a cookie value, confirming.
There could possibly be more, but rg is taking too long. Andreas, can you run a search for the pattern I sent you via IRC to find more of these? Be prepared for false positives given the very generic string, and possibly limit your search to just xpis to save time. Otherwise, go ahead and stage the above GUIDs.
The block has been staged. Jorge, can you please review and push?