'No Firefox binary found at null' with custom path missing .exe (Windows)

[kumar303]

On Windows, if you use a browser path that doesn't end in .exe, you get No Firefox binary found at null. We should probably make this error a little bit more clear.

Here is an example using jpm:

U:\addons\test>jpm run -b "P:\INTERNET\BROWSERS\FF 47"
JPM [info] Starting jpm run on My Jetpack Addon
JPM [info] Creating a new profile
JPM [error] No Firefox binary found at null
JPM [error] Error: spawn P:\INTERNET\BROWSERS\FF 47 ENOENT

The correct command is jpm run -b "P:\INTERNET\BROWSERS\FF 47\firefox.exe"

Originally reported in mozilla-jetpack/jpm#545

[bwinton]

Can we try adding \firefox.exe before reporting the error? Ya know, just to make people's lives a little easier? 😉