Firefox is actually a 7zip SFX... You could use 7ZSplit.exe to extract the config.txt and .7z archive
For WiRAR
- Highlight all the files and choose "Add to archive"
- Check "Create sfx archive"
- Go to the
Advanced tab and hit the "SFX options" button
- In the
General tab add
setup.exe to be Run after extraction (you can add
/S to make is silent)
- In the
Modes tab you choose to make it "Hide all" and "Overwrite all files"
- Optional, in the Text and Icon you can add a SFX Firefox icon you extract using reshacker
- Hit OK
Your comment should look like this
CODE
;The comment below contains SFX script commands
Setup=setup.exe /S
Silent=1
Overwrite=1