You have to make sure that the tar file you have downloaded , does it contain source code which you can compile and run ?
Because according to my knowledge once you have download this tar file from http://download.mozilla.org/?product...nux&lang=en-US
, you need to follow these instructions.
1. Untar the tar file into any of the directory where you have read-write-execute access.
2. Now you are ready to go.
3. You just need to open the terminal and browse/go to firefox directory and run 'firefox &' command.
4. If you need it on desktop/Launch pad then you have create a shortcut and into the command/run text box you need to provide the path of the firefox executable file in firefox directory.
P.S. Same thing applies to new Thunderbird 7 application.