Your frustration is understandable, and it sounds like you've put in significant effort to troubleshoot this issue. From your description, the problems with slow loading, timeouts, and account access interference suggest a potential compatibility issue introduced in the latest Firefox update. Since other browsers like Edge, Chrome, and Safari work fine, it appears to be specific to Firefox. To address this, here are some steps you can try: 1. **Clear Cache and Cookies**: Temporary files or outdated cookies might cause conflicts. 2. **Check Add-ons**: Disable extensions or run Firefox in Safe Mode to rule out add-on interference. 3. **Network Settings**: Reset Firefox's proxy and DNS settings under *Settings > Network*. 4. **Reinstall Firefox**: Ensure a clean install by downloading the latest version from Mozilla. If these steps don't resolve the issue, report it directly to Mozilla via [Bugzilla](https://bugzilla.mozilla.org/). Including detailed information (e.g., Firefox version, affected sites) can help their team identify and address the issue. Switching browsers temporarily may help, but with further updates, Firefox might resolve this soon.