Firefox is my browser of choice, and I'm struggling to keep a second Firefox in my system to use for testing purposes (cucumber, selenium and geckodriver, if you're curious). The second Firefox is an older one (45) that is used only as headless browser to run acceptance tests. Distribution is Manjaro Linux:
ngw@blackstar ~ uname -a Linux blackstar 4.9.20-1-MANJARO #1 SMP PREEMPT Fri Mar 31 17:49:34 UTC 2017 x86_64 GNU/Linux
I've tried to download the Firefox I need, unpack it into /opt and ln -s it in /usr/local/bin with a different name (firefox45):
ngw@blackstar ~ ls -l /usr/bin/firefox45 lrwxrwxrwx 1 root root 20 May 6 17:39 /usr/bin/firefox45 -> /opt/firefox/firefox ngw@blackstar ~ firefox45 -v
Mozilla Firefox 45.0
Unfortunately for reasons I can't explain that executable starts my real, up to date Firefox (53.0), I double checked with about: inside the browser.
What's the easiest possible way to solve this problem?