fix: Bypass WSL check if Firefox is present in WSL environment

Fixes #107.

index.js

@@ -3,6 +3,7 @@
 var fs = require('fs')
 var path = require('path')
 var isWsl = require('is-wsl')
+var which = require('which')
 var { execSync } = require('child_process')
 var { StringDecoder } = require('string_decoder')
 
@@ -18,6 +19,11 @@ var PREFS = [
   'user_pref("extensions.enabledScopes", 15);'
 ].join('\n')
 
+// Check if Firefox is installed on the WSL side and use that if it's available
+if (isWsl && which.sync('firefox', { nothrow: true })) {
+  isWsl = false
+}
+
 // Get all possible Program Files folders even on other drives
 // inspect the user's path to find other drives that may contain Program Files folders
 var getAllPrefixes = function () {

package.json

@@ -52,6 +52,7 @@
     "Žilvinas Urbonas <[email protected]>"
   ],
   "dependencies": {
-    "is-wsl": "^2.1.1"
+    "is-wsl": "^2.1.1",
+    "which": "^2.0.1"
   }
 }

yarn.lock

@@ -3191,6 +3191,13 @@ which@^1.2.9:
   dependencies:
     isexe "^2.0.0"
 
+which@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/which/-/which-2.0.1.tgz#f1cf94d07a8e571b6ff006aeb91d0300c47ef0a4"
+  integrity sha512-N7GBZOTswtB9lkQBZA4+zAXrjEIWAUOB93AvzUiudRzRxhUdLURQ7D/gAIMY1gatT/LTbmbcv8SiYazy3eYB7w==
+  dependencies:
+    isexe "^2.0.0"
+
 [email protected]:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/wide-align/-/wide-align-1.1.3.tgz#ae074e6bdc0c14a431e804e624549c633b000457"