Are there any messages in the Sync log that might explain what happens?

You can open the about:sync-log page via the location bar to check the logs.

Thanks for your attention to my problem cor-el.

Yes, as it turns out, I think so, although the explanation is pretty opaque to me. Parhaps you can help me make sense of it.

Typing "about:sync-log" into the URL field did show nine entries:

==============================================

• Index of file:///Users/gil/Library/Application Support/Firefox/Profiles/0eatxorm.default/weave/logs/

Up to higher level directory Name Size Last Modified

File:error-1391234406585.txt 15 KB 1/31/14 1/31 10:00:06 PM

File:error-1391320814569.txt 11 KB 2/1/14 2/1 10:00:14 PM

File:error-1391323103317.txt 9 KB 2/1/14 2/1 10:38:23 PM

File:error-1391334909387.txt 10 KB 2/2/14 2/2 1:55:09 AM

File:error-1391336165895.txt 9 KB 2/2/14 2/2 2:16:05 AM

File:error-1391336249509.txt 10 KB 2/2/14 2/2 2:17:29 AM

File:error-1391338186834.txt 10 KB 2/2/14 2/2 2:49:46 AM

File:error-1391424624737.txt 10 KB 2/3/14 2/3 2:50:24 AM

File:error-1391484360238.txt 11 KB 2/3/14 2/3 7:26:00 PM

==============================================

Clicking on the last (latest) entry did reveal a long log, the last of which is:

==============================================

1391484356821 Sync.Collection DEBUG mesg: POST fail 413 https://phx-sync566.services.mozilla.com/1.1/lsitlnguyke6ifiwe3j7bqzkcipenui6/storage/history

1391484356821 Sync.Collection DEBUG POST fail 413 https://phx-sync566.services.mozilla.com/1.1/lsitlnguyke6ifiwe3j7bqzkcipenui6/storage/history

1391484356821 Sync.Engine.History DEBUG Uploading records failed: "client issue: request body too large"

1391484356835 Sync.Status DEBUG Status for engine history: error.engine.reason.record_upload_fail

1391484356836 Sync.Status DEBUG Status.service: success.status_ok => error.sync.failed_partial

1391484356836 Sync.ErrorHandler DEBUG history failed: "client issue: request body too large" No traceback available

1391484356837 Sync.Engine.Passwords INFO 0 outgoing items pre-reconciliation

1391484356838 Sync.Engine.Passwords INFO Records: 0 applied, 0 successfully, 0 failed to apply, 0 newly failed to apply, 0 reconciled.

1391484356839 Sync.Engine.Prefs INFO 0 outgoing items pre-reconciliation

1391484356841 Sync.Engine.Prefs INFO Records: 0 applied, 0 successfully, 0 failed to apply, 0 newly failed to apply, 0 reconciled.

1391484356842 Sync.Engine.Tabs INFO 1 outgoing items pre-reconciliation

1391484356843 Sync.Engine.Tabs INFO Records: 0 applied, 0 successfully, 0 failed to apply, 0 newly failed to apply, 0 reconciled.

1391484356904 Sync.Engine.Tabs INFO Uploading all of 1 records

1391484356905 Sync.Collection DEBUG POST Length: 3896

1391484357836 Sync.Tracker.History DEBUG Saving changed IDs to history

1391484357839 Sync.Tracker.Passwords DEBUG Saving changed IDs to passwords

1391484360196 Sync.Collection DEBUG mesg: POST success 200 https://phx-sync566.services.mozilla.com/1.1/lsitlnguyke6ifiwe3j7bqzkcipenui6/storage/tabs

1391484360196 Sync.Collection DEBUG POST success 200 https://phx-sync566.services.mozilla.com/1.1/lsitlnguyke6ifiwe3j7bqzkcipenui6/storage/tabs

1391484360197 Sync.Engine.Addons DEBUG Refreshing reconciler state

1391484360197 Sync.AddonsReconciler INFO Refreshing global state from AddonManager.

1391484360201 Sync.AddonsReconciler DEBUG Rectifying state for addon: {b9db16a4-6edc-47ec-a1f4-b86292ed211d}

1391484360201 Sync.AddonsReconciler DEBUG Rectifying state for addon: {e5bbc237-c99b-4ced-a061-0be27703295f}

1391484360201 Sync.AddonsReconciler DEBUG Rectifying state for addon: {972ce4c6-7e08-4474-a285-3208198ce6fd}

1391484360202 Sync.AddonsReconciler DEBUG Rectifying state for addon: {505bfc3b-f268-a621-ea7c-ee24edc7e9d7}

1391484360207 Sync.AddonsReconciler DEBUG Rectifying state for addon: {07b90314-1e79-c84a-4b47-fb7e1853be39}

1391484360207 Sync.AddonsReconciler DEBUG Rectifying state for addon: {74371a3c-c075-3492-3651-7bf29070386e}

1391484360209 Sync.AddonsReconciler DEBUG Rectifying state for addon: {f866c37a-90e8-8d22-6179-79a836a182c6}

1391484360211 Sync.AddonsReconciler DEBUG Rectifying state for addon: {6f741052-6a98-bdcf-55f4-6c4e6ca91487}

1391484360214 Sync.AddonsReconciler DEBUG Rectifying state for addon: {9fb7a440-620c-9764-ec7f-0af0e330a02e}

1391484360216 Sync.AddonsReconciler DEBUG Rectifying state for addon: {e9b83c9c-3491-b32e-dbdd-677bffca6d40}

1391484360218 Sync.AddonsReconciler DEBUG Rectifying state for addon: {e3e6097d-ec9d-3988-b23b-b9fae361490f} 1391484360220 Sync.AddonsReconciler DEBUG Rectifying state for addon: {762ca461-77f7-a4c5-e223-bbe38bddbdf5}

1391484360222 Sync.AddonsReconciler DEBUG Rectifying state for addon: {ab02b0ff-1686-2ad8-831f-14623b33cf6e}

1391484360224 Sync.AddonsReconciler DEBUG Rectifying state for addon: {96a5484f-71fc-7c3d-7e08-f5829911412f}

1391484360226 Sync.AddonsReconciler DEBUG Rectifying state for addon: {5ea60f7e-7eef-6fb6-03fc-6bb8b4b1aed4}

1391484360229 Sync.AddonsReconciler INFO Saving reconciler state to file: addonsreconciler

1391484360234 Sync.Store.Addons DEBUG {93251d3a-c79a-5b44-9bef-762ed0371d40} not syncable: type not in whitelist: plugin

1391484360234 Sync.Store.Addons DEBUG {bb88b48c-2c59-8b2c-371d-b883de9ad2a1} not syncable: type not in whitelist: plugin

1391484360234 Sync.Store.Addons DEBUG {f866c37a-90e8-8d22-6179-79a836a182c6} not syncable: type not in whitelist: plugin

1391484360234 Sync.Store.Addons DEBUG {ba4e3351-ca1d-4cbd-718c-191c1eab7397} not syncable: type not in whitelist: plugin

1391484360234 Sync.Store.Addons DEBUG {07b90314-1e79-c84a-4b47-fb7e1853be39} not syncable: type not in whitelist: plugin

1391484360234 Sync.Store.Addons DEBUG {505bfc3b-f268-a621-ea7c-ee24edc7e9d7} not syncable: type not in whitelist: plugin

1391484360234 Sync.Store.Addons DEBUG {93251d3a-c79a-5b44-9bef-762ed0371d40} not syncable: type not in whitelist: plugin

1391484360235 Sync.Engine.Addons INFO 0 outgoing items pre-reconciliation

1391484360236 Sync.Engine.Addons INFO Records: 0 applied, 0 successfully, 0 failed to apply, 0 newly failed to apply, 0 reconciled.

1391484360237 Sync.Synchronizer INFO Sync completed at 2014-02-03 19:26:00 after 35.28 secs.

1391484360237 Sync.SyncScheduler DEBUG Next sync in 86400000 ms.

1391484360237 Sync.ErrorHandler DEBUG Some engines did not sync correctly.

==============================================

(N.B. - I inserted some carriage returns to make the above readable.)

Does this explain what the problem is?

On a related topic, cor-el, can you explain for me me in a nutshell what "sync" means?

Thanks for your help,

--Gil

You appear to have set up Sync to store data on the Sync server to be able to share this data with other devices.

If you do not want to use Sync then you can disconnect (unlink) your computer.

• https://support.mozilla.org/kb/what-firefox-sync
• https://support.mozilla.org/kb/how-do-i-set-up-firefox-sync

• https://support.mozilla.org/kb/how-do-i-manage-my-firefox-sync-account

Thanks, cor-el!

That's exactly what I needed.

Thanks for the links.

--Gil

This still hasn't helped. I still get the message "Sync encountered an error while syncing: Unknown error." when I am trying to link to a different computer without the other computer. What's the next step? Thank you