Hello everyone I hope you all are doing fantastic! I'm writing this post due to from one moment to another my outlook stopped worked by using firefox! :( I did investigate in similar forums here in the mozilla support, for example this one: https://support.mozilla.org/en-US/questions/1114389 It seems everything got fixed in a patch from my understanding. I could observe core filres were generated and I'm not even sure if that's related to it but may be useful. At the moment here is everything I've tried. 1. Clear history, cache for everything. 2. Refresh firefox and Refresh with Add-ons disabled too. 3. I uninstall firefox, since I'm using a Mac I deleted the Library/Application Support/Firefox folder and the Library/Caches/Firefox and Library/Cache/Mozilla. I'm concerned because, also if I open Chrome for example I can use the outlook without a problem. Please, all the help will be really appreciate it!! Have an amazing day, regards.