Hello Sbdron1986,

You could consider using the portable edition (scroll down to your preferred language), as it will not interfere with your release Firefox version and profile.

Unless you plan to run them in Wine or such ignore the above reply as it is for Windows 7 or later.

Sbdron1986 said

i need two good works version on my system. Please help me with this problem. How can i run old version and create desctop icon. thanks

You can just extract the Firefox tarballs to their own folders in Home and then set the desktop launchers to the firefox script to start with a specific Profile or with ProfileManager. https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles

You can grab the version you want from https://archive.mozilla.org/pub/firefox/releases/ then x86_64 for 64-bit or i686 for 32-bit and then the language.

See also:

• https://developer.mozilla.org/en-US/Command_Line_Options
• https://developer.mozilla.org/en-US/Mozilla/Multiple_Firefox_Profiles

James said

Unless you plan to run them in Wine or such ignore the above reply as it is for Windows 7 or later.

Thank you for pointing that out, James. I looked at the OP's system details that says "Windows 7" and I totally overlooked the fact that Sbdron1986 mentions "Centos 7".

My apologies to Sbdron1986 .......

thanks for ur answers. It good work in win system. But i need do it in CentOS!!!

Sbdron1986 said

thanks for ur answers. It good work in win system. But i need do it in CentOS!!!

I know, and I apologize for giving you the wrong advice earlier.

Please do as James suggested, and maybe this will help :

https://libre-software.net/how-to-install-firefox-on-ubuntu-linux-mint/#

(For CentOS as well - you may have to scroll down and read what is says under "D")