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Sync wont update - "The lookup of the hostname failed" error

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My bookmarks and open tabs did sync successfully when I initially logged into my firefox account, but has not updated since. The sync icon spins continuously and does not update. I am using the most up to date version of the software and app. I have allowed notifications from Firefox on my iphone but it has never requested permission to sync.

Error log says "The lookup of the hostname failed". How can I fix this?

https://support.mozilla.org/en-US/questions/1249398 - looks like this person had a similar problem that was never solved.

Thanks!

My bookmarks and open tabs did sync successfully when I initially logged into my firefox account, but has not updated since. The sync icon spins continuously and does not update. I am using the most up to date version of the software and app. I have allowed notifications from Firefox on my iphone but it has never requested permission to sync. Error log says "The lookup of the hostname failed". How can I fix this? https://support.mozilla.org/en-US/questions/1249398 - looks like this person had a similar problem that was never solved. Thanks!

Chosen solution

Let's start with, Many site issues can be caused by corrupt cookies or cache.

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

If there is still a problem, Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Did this help?

While you are in safe mode;

Try disabling graphics hardware acceleration in Firefox. Since this feature was added to Firefox it has gradually improved but there are still a few glitches.

How to disable Hardware Acceleration {web link}

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Additional System Details

Installed Plug-ins

  • Shockwave Flash 32.0 r0

Open H264 Video Codec Widevine Content Decryption Module (all automatically downloaded by Firefox)

Application

  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:66.0) Gecko/20100101 Firefox/66.0

More Information

FredMcD
  • Top 10 Contributor
4220 solutions 58909 answers

Chosen Solution

Let's start with, Many site issues can be caused by corrupt cookies or cache.

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

If there is still a problem, Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Did this help?

While you are in safe mode;

Try disabling graphics hardware acceleration in Firefox. Since this feature was added to Firefox it has gradually improved but there are still a few glitches.

How to disable Hardware Acceleration {web link}

Let's start with, Many site issues can be caused by corrupt cookies or cache. '''Warning ! ! ''' This will log you out of sites you're logged in to. You may also lose any settings for that website. * [https://support.mozilla.org/en-US/kb/delete-cookies-remove-info-websites-stored Delete cookies to remove the information websites have stored on your computer] {web link} * [https://support.mozilla.org/en-US/kb/how-clear-firefox-cache How to clear the Firefox cache] {web link} If there is still a problem, '''[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Start Firefox in Safe Mode]''' {web link} by holding down the '''<Shift> ''(Mac=Options)''''' key, and then starting Firefox. A small dialog should appear. Click '''Start In Safe Mode''' (not Refresh). Did this help? While you are in safe mode; Try disabling graphics hardware acceleration in Firefox. Since this feature was added to Firefox it has gradually improved but there are still a few glitches. ''[https://support.mozilla.org/en-US/kb/forum-response-disable-hardware-acceleration How to disable Hardware Acceleration]'' {web link}
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FredMcD
  • Top 10 Contributor
4220 solutions 58909 answers

We need to look at the sync logs. Type about:sync-log<enter> in the address bar of the not syncing unit.

Open the last file created and Copy its contents Now Paste it into this forum.

If the file is too large;


Open a text/word program and load the file. Left-click once. Now <Control> A to highlight everything, then <Control> C to copy it.

Next, have your web browser go to; https://pastebin.com/

Paste <Control> P the content of the file in the window. Note: On the bottom, fill out the boxes as best you can.

Now press Create A New Paste. The page will reload. Copy the new web address, and post it here.

We need to look at the sync logs. Type ''' about:sync-log'''<enter> in the address bar of the not syncing unit. Open the last file created and '''Copy''' its contents Now '''Paste''' it into this forum. If the file is too large; Open a text/word program and load the file. Left-click once. Now '''<Control> A''' to highlight everything, then '''<Control> C''' to copy it. Next, have your web browser go to; '''https://pastebin.com/''' Paste '''<Control> P''' the content of the file in the window. '''Note: ''' On the bottom, fill out the boxes as best you can. Now press '''Create A New Paste. ''' The page will reload. Copy the new web address, and post it here.
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cor-el
  • Top 10 Contributor
  • Moderator
17408 solutions 157260 answers

In case of issues with Sync you can try this:

Disconnect from Sync and Reconnect to Sync again. You can disconnect from Sync by clicking the e-mail address in the "3-bar" Firefox menu button drop-down list or go to "Options/Preferences > Sync".

Delete the signedInUser.json file in the Firefox profile folder and delete the Weave folder (Sync was formerly named Weave) with Firefox closed.

Remove an existing chrome://FirefoxAccounts entry in the Firefox Password Manager.

If that isn't enough then delete the prefs.js files to reset all prefs and maybe also delete the compatibility.ini file to reinitialize the profile.

Delete and re-create the Firefox account or change the Sync password. Note that changing the Sync password will wipe all data stored on the Sync server.

You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.

In case of issues with Sync you can try this: Disconnect from Sync and Reconnect to Sync again. You can disconnect from Sync by clicking the e-mail address in the "3-bar" Firefox menu button drop-down list or go to "Options/Preferences > Sync". Delete the signedInUser.json file in the Firefox profile folder and delete the Weave folder (Sync was formerly named Weave) with Firefox closed. Remove an existing chrome://FirefoxAccounts entry in the Firefox Password Manager. If that isn't enough then delete the prefs.js files to reset all prefs and maybe also delete the compatibility.ini file to reinitialize the profile. Delete and re-create the Firefox account or change the Sync password. Note that changing the Sync password will wipe all data stored on the Sync server. You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the <b>about:profiles</b> page. *Help -> Troubleshooting Information -> Profile Directory:<br>Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder *http://kb.mozillazine.org/Profile_folder_-_Firefox
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Question owner

Clearing the cache and deleting cookies worked. Thank you!

Clearing the cache and deleting cookies worked. Thank you!
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