I have confirmed logging onto Firefox Sync does indeed break Netflix for me. I just was not so sure until now... Details: I've gone a couple weeks without syncing and had no issues with any websites; watched lots of Netflix too. After today's upgrade to FF97, I decided to risk it and log back onto Sync. Right away Netflix was broken in its tab, with "Pardon the Interruption. This title is not available to be watched instantly. Please try another title. -1044" and then "Error Code F7121 - 1331" I have received this error code and more other similar ones from Netflix back a few weeks ago when I was actively troubleshooting this glitch. None of the fixes worked, and the ones that involved sifting through many dozens of about:config settings were avoided. Thing is, back then, I made no changes I can surely recall, except upgrading to FF 96. OK, maybe some others... And what's happening to my Netflix tab is not happening to any other tabs/sites, now or before; just Netflix. I'm hoping someone here has seen this same thing happen and can shed some light on why my FF synced login breaks Netflix but when I'm not logged in, Netflix is ok. Thanks;