A possible cause is a problem with the file places.sqlite that stores the bookmarks and the history.

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 also try to repair the places database with this extension:

https://addons.mozilla.org/firefox/addon/places-maintenance/ Try to repair the disk permissions:

http://thexlab.com/faqs/repairprocess.html http://guides.macrumors.com/Repairing_Permissions Try to remove the Firefox plist file (org.mozilla.firefox.plist).

http://www.macfixit.com/article.php?story=20060606082246983 How .plist files become corrupt and troubleshooting the results Go to "~/Library/Preferences" and remove the plist file for Firefox (org.mozilla.firefox.plist)

Please reply if that helped . Thanks !

Hello,

Certain Firefox problems can be solved by performing a Clean reinstall. This means you remove Firefox program files and then reinstall Firefox. Please follow these steps:

Note: You might want to print these steps or view them in another browser.

1. Download the latest Desktop version of Firefox from http://www.mozilla.org and save the setup file to your computer.
2. After the download finishes, close all Firefox windows (click Exit from the Firefox or File menu).
3. Delete the Firefox installation folder, which is located in one of these locations, by default:
   • Windows:
     • C:\Program Files\Mozilla Firefox
     • C:\Program Files (x86)\Mozilla Firefox
   • Mac: Delete Firefox from the Applications folder.
   • Linux: If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it - see Install Firefox on Linux. If you downloaded and installed the binary package from the Firefox download page, simply remove the folder firefox in your home directory.
4. Now, go ahead and reinstall Firefox:
   1. Double-click the downloaded installation file and go through the steps of the installation wizard.
   2. Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.

Please report back to see if this helped you!

Thank you.

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

Note that your System Details List shows that you have a user.js file in the profile folder to initialize some prefs on each start of Firefox.

The user.js file is only present if you or other software has created it, so normally it wouldn't be there. you can check its content with a plain text editor if you didn't create this file yourself.

The user.js file is read each time you start Firefox and initializes preferences to the value specified in this file, so preferences set via user.js can only be changed temporarily for the current session.

• http://kb.mozillazine.org/Preferences_not_saved

nope didn't make any difference,

unfortunately these are all the standard answers that i'd already tried

This feed doesn't validate:

• http://validator.w3.org/feed/check.cgi?url=http%3A%2F%2Fkaitou-fansubs.com%2F%3Ffeed%3Drss2

Ahh well then i guess what changed in the update was improved validation, which has killed some badly formed feeds