Firefox 3.6.12 is the current version and it was released only a few days after the release of Firefox 3.6.11 to fix a critical security issue that was discovered. The security fix was prepared and released within 48 hours after discovery. I do not know what caused your problems in trying to upgrade to Firefox 3.6.11, but the point is moot now. Should you have future problems upgrading, please post back here and someone will assist you. You can keep one copy of version 3.6.11 if you wish; I usually keep 2 prior versions plus the current version. You can download the full version(s), not just the small update, from: ftp://ftp.mozilla.org/pub/mozilla.org/firefox/releases/ ---------------------------- <br /> The information submitted with your question indicates that you have out of date plugins with known security issues that should be updated. To see the plugins submitted with your question, click "More system details..." to the right of your original question post. * Adobe PDF Plug-In For Firefox and Netscape * Next Generation Java Plug-in 1.6.0_21 for Mozilla browsers #'''Check your plugin versions''': http://www.mozilla.com/en-US/plugincheck/ #*'''Note: plugin check page does not have information on all plugin versions''' #'''Update Adobe Reader (PDF plugin):''' #*From within your existing Adobe Reader ('''<u>if you have it already installed</u>'''): #**Open the Adobe Reader program from your Programs list #**Click Help > Check for Updates #**Follow the prompts for updating #**If this method works for you, skip the "Download complete installer" section below and proceed to "After the installation" below #*Download complete installer ('''if you do <u>NOT</u> have Adobe Reader installed'''): #**Use Firefox to download and SAVE the installer to your hard drive from the link in the article below #**On the Adobe page, un-check any extra items (i.e. Free McAfee® Security Scan Plus) then click Download button #**If you see message just under tabs, DO NOT click the Allow button, instead click below that where it says "click here to download". #**Click "Save to File"; save to your Desktop (so you can find it) #**After download completes, close Firefox #**Click the installer you just downloaded and allow the install to continue #***Note: Vista and Win7 users may need to right-click the installer and choose "Run as Administrator" #**'''<u>Download link and more information</u>''': https://support.mozilla.com/en-US/kb/Using+the+Adobe+Reader+plugin+with+Firefox#Installing_and_updating_Adobe_Reader #*After the installation, start Firefox and check your version again. #'''Update Java:''' #* Download and update instructions: https://support.mozilla.com/en-US/kb/Using+the+Java+plugin+with+Firefox #* Removing old versions (if needed): http://www.java.com/en/download/faq/remove_olderversions.xml #* Remove multiple Java Console extensions (if needed): http://kb.mozillazine.org/Java#Multiple_Java_Console_extensions #* After the installation, start Firefox and check your version again.