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Problem with Syncing Bookmarks in Firefox

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  • 9 have this problem

I have a big problem with Firefox Sync on my Windows laptop. I constantly get the following error: "Sync encountered an error while synchronising: Unknown error. Sync will automatically retry this action."

The error has always been there since I've set up Sync on Firefox on that computer.

Looking at "about: sync-log" revealed that the issue is with the bookmarks syncing engine. Here are the relevant lines from the log:

1351062615899 Sync.Engine.Bookmarks DEBUG First sync, uploading all items

1351062616754 Sync.Store.Bookmarks DEBUG No node for GUID mobile; returning no children.

1351062616755 Sync.Engine.Bookmarks INFO 1122 outgoing items pre-reconciliation

1351062616791 Sync.Status DEBUG Status for engine bookmarks: error.engine.reason.unknown_fail

1351062616791 Sync.Status DEBUG Status.service: success.status_ok => error.sync.failed_partial

1351062616792 Sync.ErrorHandler DEBUG bookmarks failed: Component returned failure code: 0x80520012 (NS_ERROR_FILE_NOT_FOUND) [nsIFile.create] Stack trace: PU_B_saveBookmarksToFile()@resource://gre/modules/PlacesUtils.jsm:1882 < PU_B_create()@resource://gre/modules/PlacesUtils.jsm:2013 < PU_archiveBookmarksFile()@resource://gre/modules/PlacesUtils.jsm:1754 < <file:unknown> < _syncStart()@resource:///modules/services-sync/engines/bookmarks.js:350 < <file:unknown> < SyncEngine__sync()@resource://services-sync/engines.js:1282 < <file:unknown> < wrappedSync()@resource:///modules/services-sync/engines/bookmarks.js:214 < _sync()@resource:///modules/services-sync/engines/bookmarks.js:220 < <file:unknown> < WrappedNotify()@resource://services-sync/util.js:142 < <file:unknown> < Engine_sync()@resource://services-sync/engines.js:481 < <file:unknown> < WeaveSvc__syncEngine()@resource:///modules/services-sync/service.js:1393 < resource:///modules/services-sync/service.js:1286 < <file:unknown> < WrappedNotify()@resource://services-sync/util.js:142 < WrappedLock()@resource://services-sync/util.js:97 < <file:unknown> < _lockedSync()@resource:///modules/services-sync/service.js:1186 < resource:///modules/services-sync/service.js:1177 < <file:unknown> < WrappedCatch()@resource://services-sync/util.js:71 < <file:unknown> < sync()@resource:///modules/services-sync/service.js:1165 < <file:unknown> < <file:unknown>

I've tried cleaning the sync data on the server, and "Reset Sync" various times, to no avail. Syncing add-ons and passwords works fine (I don't sync anything else). Please help! Syncing bookmarks is the main reason I'm using Sync at all!

Modified by Tsela

Additional System Details

Installed Plug-ins

  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Google Update
  • Shockwave Flash 11.4 r402
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.3
  • 5.0.61118.0
  • Adobe Shockwave for Director Netscape plug-in, version 11.6
  • Default Plug-in
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
  • Adobe PDF Plug-In For Firefox and Netscape


  • User Agent: Mozilla/5.0 (Windows NT 6.0; rv:16.0) Gecko/20100101 Firefox/16.0

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