User Services/Sync/Debug Sync

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Often it's helpful to provide diagnostic log data in bugs to help a developer fix an issue. Here are some tips:

Desktop

  1. goto about:config
  2. In the filter field type 'sync.log'
  3. Context click on pref and set it as:
    • services.sync.log.appender.file.logOnSuccess to True
    • services.sync.log.logger.engine.bookmarks to Trace
  4. In Firefox, go here: about:sync-log
  5. You should see Success and Error logs. You can click to open, often you will want to upload this to your bug.

You can also open the console to view errors: Tools > Web Developer > Web Console

How to force reauthentication

When you reset password this will cause all other devices to reauthenticate. To force that, edit this file:

<profile location [1] >/signedInUser.json

and delete some characters from the sessionToken value:

"sessionToken":"abcdef"

[1] Profile locations

Windows XP / 2000 / Vista / 7 	%AppData%\Mozilla\Firefox\Profiles\xxxxxxxx.default\signedInUser.json
Linux 	~/.mozilla/firefox/xxxxxxxx.default/signedInUser.json
Mac OS X 	~/Library/Application Support/Firefox/Profiles/xxxxxxxx.default/signedInUser.json

Android

These instructions are for advanced users only - unfortunately there are no simpler instructions which are approachable for general users.

adb devices

(Note that you will either need to add the directory containing adb to your PATH, or specify the full path to it in the command above)

  • To view sync-related logging, run:
adb logcat | grep -i  -E "(sync15|sync_manager|FirefoxAccount)"