try to delete it from the mozilla firefox folder

See: * http://support.mozilla.com/en-US/kb/Clearing+Location+bar+history * https://support.mozilla.com/en-US/kb/Cannot+clear+Location+bar+history ---------------------------------------------- <br /> You need to update your plug-ins. It is important to keep them updated due to continuing security fixes and improvements in those plug-ins: * Macromedia Shockwave for Director Netscape plug-in, version 11.5 (you '''<u>may</u>''' need to update) * Adobe PDF Plug-In For Firefox and Netscape 9.3.3 * Shockwave Flash 10.1 r53 * Java Plug-in 1.6.0_20 for Netscape Navigator #Check your plugin versions: http://www.mozilla.com/en-US/plugincheck/ #*'''Note: plugin check page does not have information on all plugin versions''' #'''Update Shockwave for Director''' #*NOTE: this is not the same as Shockwave Flash; this installs the Shockwave Player. #*Use Firefox to download and SAVE the installer to your hard drive from the link in the article below (Desktop is a good place so you can find it). #*When the download is complete, exit Firefox (File > Exit) #*locate and double-click in the installer you just downloaded, let the install complete. #*Restart Firefox and check your plugins again. #*'''<u>Download link and more information</u>''': http://support.mozilla.com/en-US/kb/Using+the+Shockwave+plugin+with+Firefox #'''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 Shockwave Flash''' #*Use Firefox to Download and SAVE to your hard drive from the link in article below #*SAVE to your Desktop so you can find it #*After download completes, close Firefox #*Click on the file you just downloaded and install #**Note: Vista and Win7 users may need to right-click the installer downloaded and choose "Run as Administrator" #**Note: Most browsers other than IE will also get updated with this one download #**Note: To update IE, same procedure '''<u>but use IE</u>''' to go: http://fpdownload.macromedia.com/get/flashplayer/current/install_flash_player_ax.exe #*After installation, restart Firefox and check your version again. #*'''<u>Download link and other information</u>''': https://support.mozilla.com/en-US/kb/Managing+the+Flash+plugin#Updating_Flash #'''Update Java:''' #* Download and update instructions: https://support.mozilla.com/en-US/kb/Using+the+Java+plugin+with+Firefox #* Removing old versions: http://www.java.com/en/download

If you've used that profile in the past with Firefox 2 versions then you may have left a file history.dat that you need to delete as well. See http://kb.mozillazine.org/History.dat and http://kb.mozillazine.org/Profile_folder_-_Firefox

where is the folder where the firefox history is stored?

Help > Troubleshooting Information > Profile Directory > Open Containing folder See also [[Using the Troubleshooting Information page]]