Two methods: * Tools > Options > Advanced > General > System Defaults section, check "Always check to see if Firefox is the default browser on startup", click "Check Now" button, answer pop-up. See: https://support.mozilla.com/en-US/kb/Options+window+-+Advanced+panel#General_tab * Setting the default browser manually in Windows: http://kb.mozillazine.org/Setting_Your_Default_Browser#Setting_default_browser_manually --------------------------------- <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 The information submitted with your question indicates that you have out of date plugins with known security issues that should be updated.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 Shockwave for Director Netscape plug-in, version 11.5 * Java Plug-in 1.5.0_16 for Netscape Navigator (DLL Helper) ** Very old version. You may want to remove before installing current version. Link to nstructions below. #'''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 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.