Install Firefox Developer Edition Debian
Hi! The Tutorial shows you Step-by-Step How to Install Firefox Developer Edition Browser for Debian 6-Squeeze/7-Wheezy/8-Jessie/9-Stretch/10-Buster/11-Bullseye/12-Bookworm GNU/Linux Desktops.
And the Firefox Developer Edition for Debian contains the newest features and innovations in an unstable environment even before they go to Beta.
Moreover, the Firefox Developer Version Coexists Perfectly with Other Eventual Firefox Versions on System, this meaning that it’s sharing the Default Environment.
Inside you find also detailed instructions about How to Create a Launcher for Firefox Browser on Linux Desktop.

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Open a Shell Terminal emulator window
(Press “Enter” to Execute Commands)In case first see: Terminal QuickStart Guide.
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Download Firefox Developer Edition for Linux
Here Firefox Developer i686/x64 tar.bz2Link to Download Firefox Developer Edition 32/64-bit tar.bz2 Linux Release -
Double-Click on Archive and Extract into /tmp.
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Then Relocate Firefox Directory
Login as SuperUser
Copysu -
If Got “User is Not in Sudoers file” then see: How to Enable sudo
Relocate firefox Into firefox-dev:Copysudo chown -R root:root /tmp/firefox
Copymv /tmp/firefox /opt/firefox-dev
Make a firefox-dev Symlink for Easy-Starting:
Copyln -s /opt/firefox-dev/firefox /usr/local/bin/firefox-dev
Achieve the SuperUse session with:
Copyexit
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Finally, Launch & Enjoy Firefox Developer Edition :)
From Terminal:Copyfirefox-dev
To Start from Desktop Create Custom Debian App Launcher
Here How to Make a LauncherHow to Create an Application Launcher on Debian Desktop Detailed Visual-Guide
How to Install Google-Chrome Web Browser on Debian
SetUp Chrome on Debian.