HI garmp,

If you open up a new tab and put about:sync-log in the url bar, check the last few text files and can you confirm is there are any 400 or 500 errors?

If so, this issue has been resolved and if you log out then back in via accounts.firefox.com you should now be able to see bookmarks sync across devices.

Please also make sure to update to 44.

Start Firefox in Safe Mode to check if one of the extensions (3-bar Menu button/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

• Switch to the DEFAULT theme: 3-bar Menu button/Tools > Add-ons > Appearance
• Do NOT click the Reset button on the Safe Mode start window

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes