Tap here to go to the mobile version of the site.
Your Firefox is out of date and may contain a security risk! Upgrade Firefox

Support Forum

I found what causes the memory leaks.


I have tried everything that supposedly clears my cache and it hasn't worked. Including a clear cache button. Well, I noticed something recently. This only seems to happen when I hover over a bookmark folder with TONS of bookmarks in it, or open up the downloads box and I haven't cleaned it up recently. So, really we need an addon to clear whatever cache holds all of the website icons displayed in our bookmarks or clear that memory sector up or whatever.

Additional System Details

This happened

Every time Firefox opened

This started when...

Forever ago

Installed Plug-ins

  • Shockwave Flash 11.1 r102
  • Office Plugin for Netscape Navigator
  • 1.9.0042.0
  • npdivxplayerplugin
  • Coupons, Inc. Coupon Printer DLL
  • Coupons, Inc. Coupon Printer Plugin
  • Adobe PDF Plug-In For Firefox and Netscape
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • Default Plug-in
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • RealPlayer Download Plugin
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • RealJukebox Netscape Plugin
  • Roblox Launcher Plugin
  • Unity Player 2.6.1f3
  • Adobe Shockwave for Director Netscape plug-in, version
  • DivX Web Player version
  • DivX® Content Upload Plugin
  • DivX VOD Helper Plug-in
  • Next Generation Java Plug-in 1.6.0_31 for Mozilla browsers
  • Nexon Game Controller
  • RealPlayer(tm) HTML5VideoShim Plug-In
  • RealNetworks(tm) RealPlayer Chrome Background Extension Plug-In
  • Adobe PDF Plug-In For Firefox and Netscape "9.4.5"


  • User Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv: Gecko/20120128 Firefox/3.6.26 ( .NET CLR 3.5.30729; .NET4.0C)

More Information

Like I said, it spikes after loading a long bookmark list.

  • Top 10 Contributor
2368 solutions 20957 answers

What are you seeing in your cache that you want to clear? Please note that cache (stored files) and history (stored URLs and visit dates) are kept in two different places.

Bookmark icons should be stored with your bookmarks (they are converted to a string of text). I don't think you really need to remove those, and actually, I'm not sure how you would without exporting bookmarks, flushing them, and re-importing them.

  • Top 10 Contributor
  • Moderator
10762 solutions 96861 answers

You can check for problems with the places.sqlite database file in the Firefox Profile Folder.

You can try to check and repair the places database with this extension (may not work for favicon issues).