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Problem: Firefox Sync encounters errors just every time it syncs according to About Sync add-on (February 16, 2019)

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https://docs.google.com/document/d/1rFueUs2CCN1RDe3Qzn_LVsEr1XE7KssVPhqmB20iNpo/edit?usp=sharing

Add-ons I want disabled often come enabled when I reset my PC and reinstall Firefox after signing into Firefox Sync.

https://docs.google.com/document/d/1rFueUs2CCN1RDe3Qzn_LVsEr1XE7KssVPhqmB20iNpo/edit?usp=sharing Add-ons I want disabled often come enabled when I reset my PC and reinstall Firefox after signing into Firefox Sync.

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How to disable extensions and themes

Disabling an extension or theme will turn it off without removing it:

   Click the menu button Fx57menu and choose Fx57Addons-icon Add-ons. The Add-ons Manager tab will open.
   In the Add-ons Manager tab, select the Extensions or Themes panel.
   Select the add-on you wish to disable.
   Click its Disable button.
   Click Restart now if it pops up. Your tabs will be saved and restored after the restart. 

To re-enable the add-on, find it in the list of Add-ons and click Enable, then restart Firefox if required.

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Is one of my extensions why I keep seeing "Sync failed" every time Firefox syncs?