Beginning with Firefox 4, Macs must have an Intel x86 processor; your system is a PPC Mac. *System Requirements: [https://www.mozilla.org/en-US/firefox/4.0/system-requirements/index.html Firefox 4]   [https://www.mozilla.org/en-US/firefox/5.0/system-requirements/index.html Firefox 5]   [https://www.mozilla.org/en-US/firefox/6.0/system-requirements/index.html Firefox 6]   [https://www.mozilla.org/en-US/firefox/7.0/system-requirements/index.html Firefox 7]   [https://www.mozilla.org/en-US/firefox/8.0/system-requirements/index.html Firefox 8] The good news is that Firefox 3.6.24 (which you have installed) still supports the PPC Mac architecture. The bad news is that support for the Firefox 3.6.x series is likely to end in the first quarter of 2012. *System requirements: [https://www.mozilla.org/en-US/firefox/3.6/system-requirements/index.html Firefox 3.6.x] You can try the third-party product '''''TenFourFox''''' that supports PPC Macs. The product is based on Firefox released versions. All support is provided by the developer, not by this site: *Home page: http://www.floodgap.com/software/tenfourfox/ *Developer's blog: http://tenfourfox.blogspot.com/ '''If this reply solves your problem, please click "Solved It" next to this reply when <u>signed-in</u> to the forum.''' ------------------------- Not related to your question, but... You may need to update some plug-ins. Check your plug-ins and update as necessary: *Plug-in check --> http://www.mozilla.org/en-US/plugincheck/ *Adobe Shockwave for Director Netscape plug-in: [https://support.mozilla.com/en-US/kb/Using%20the%20Shockwave%20plugin%20with%20Firefox#w_installing-shockwave Installing ('''''or Updating''''') the Shockwave plugin with Firefox] *Adobe PDF Plug-In For Firefox and Netscape: [https://support.mozilla.com/en-US/kb/Using%20the%20Adobe%20Reader%20plugin%20with%20Firefox#w_installing-and-updating-adobe-reader Installing/Updating Adobe Reader in Firefox] *Shockwave Flash (Adobe Flash or Flash): [https://support.mozilla.com/en-US/kb/Managing%20the%20Flash%20plugin#w_updating-flash Updating Flash in Firefox] *Next Generation Java Plug-in for Mozilla browsers: [https://support.mozilla.com/en-US/kb/Using%20the%20Java%20plugin%20with%20Firefox#w_installing-or-updating-java Installing or Updating Java in Firefox]

Hi Thanks for your help, I downloaded everything you stated and checked and downloaded plug-ins needing updating. Hope it all works, my Firefox has been slow and unable to use a lot of video websites recently. Because I am not so confident in my usage of computer, I am hesitant to use the Safebrowser website that is a third party and not part of Firefox, but I really cannot afford to get a new computer at the end of the first quarter of 2012. Does Firefox stand by the security and safety of Safebrowser? Thanks again.

I'm talking about the TenFourFox website, I am always nervous going to places not owned by website I have used for years. Has anyone else used them for their Tiger Mac OS X V10.4, PPC Mac?