Are you using Firefox Sync?

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

Start Firefox in Safe Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance/Themes).

• Don't make any changes on the Safe mode start window.
• https://support.mozilla.org/kb/Safe+Mode

Problems with bookmarks and history not working properly can be caused by a corrupted places.sqlite database file.

• http://kb.mozillazine.org/Bookmarks_history_and_toolbar_buttons_not_working_-_Firefox
• https://support.mozilla.org/kb/Bookmarks+not+saved#w_fix-the-bookmarks-file

You can try to check and repair the places database with this extension:

• https://addons.mozilla.org/firefox/addon/places-maintenance/

U r right. It happens in synchronized Ffox installs. I just tried in a non-synchronized one and it works fine. But i couldnt yet identify the problem.

Would prefer to always sync, or else redo by hand all lots of bookmarks again .......  :-/

thx anyway ...

• bug 697649 - Enabling bookmarks sync with firefox causes initial naming of "new folder" to lose focus

(please do not comment in bug reports)

• [/questions/923114]

u got it!

I still have this bug on two PC (Windows 7 and Windows Vista), Firefox Portable from PortableApps. I've tried cleaning history/doing places.sql maintence. My firefox version is 15.

If I disable just bookmarks sync, problem goes away