Hi @Portus! Thank you for your kind words, and my apologies for the confusion regarding the Windows issues. Upon investigation we’ve determined that both addon and tab crashes are being caused by the same bug, which is also present in Firefox, and we’re currently working with Mozilla on a fix. Due to the nature of the bug, Mozilla opted to make the ticket private – and we’ve followed suit on our end too.
In the meantime we would recommend continuing to use Tor Browser 11.0.2 without the use of additional addons or extensions . I have also heard that the tab crashes do not occur on the Safer security level, however I haven’t been able to confirm that personally – if you get the chance to test this, please let me know 
I’ll make sure to post any other updates in this thread as soon as they become available. Thanks for your patience with this one, I know this bug has been frustrating to deal with!