Myfitness Pal doesn't work correctly since the recent Firefox update
After logging in to Myfitness Pal and attempting to log in food or exercise it kicks me back to the login screen. Several others noted this yesterday in the tech forum and all mention the problem after the Firefox update.
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Hi, please check your Extensions/add-ons by : Try Firefox Safe Mode to see if the problem goes away. Firefox Safe Mode is a troubleshooting mode that temporarily turns off hardware acceleration, resets some settings, and disables add-ons (extensions and themes).
If Firefox is open, you can restart in Firefox Safe Mode from the Help menu:
- Click the menu button
, click Help 
and select Restart with Add-ons Disabled.
If Firefox is not running, you can start Firefox in Safe Mode as follows:
- On Windows: Hold the Shift key when you open the Firefox desktop or Start menu shortcut.
- On Mac: Hold the option key while starting Firefox.
- On Linux: Quit Firefox, go to your Terminal and run firefox -safe-mode
(you may need to specify the Firefox installation path e.g. /usr/lib/firefox)
When the Firefox Safe Mode window appears, select "Start in Safe Mode".
If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, theme, or hardware acceleration. Please follow the steps in the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article to find the cause.
To exit Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.
When you figure out what's causing your issues, please let us know. It might help others with the same problem.
Tried the above, same issue.
There is security software like Avast/AVG, Kaspersky, BitDefender and ESET that intercept secure connections and send their own certificate. If you are running any of the above software please their their community forum for a work around to apply settings.
These pages are also for the errors you may have besides relating to the above.
- https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can
- https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites
- https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message
- https://support.mozilla.org/en-US/kb/connection-untrusted-error-message
- http://kb.mozillazine.org/Error_loading_websites
- https://support.mozilla.org/en-US/kb/troubleshoot-SEC_ERROR_UNKNOWN_ISSUER
Please let us know if this solved your issue or if need further assistance.