FirefoxProfile: clean up temporary files

during profile setup, some temporary files/folders are
created. these temporary files/folders can grow quite large,
so clean them up after the profile has been constructed to
prevent disk space issues.

Author: gkralik

lib/Firefox/FirefoxProfile.php

@@ -98,6 +98,11 @@ public function encode() {
     $zip->close();
 
     $profile = base64_encode(file_get_contents($temp_zip));
+
+    // clean up
+    rmdir($temp_dir);
+    unlink($temp_zip);
+    
     return $profile;
   }
 
@@ -122,6 +127,10 @@ private function installExtension($extension, $profile_dir) {
     mkdir($ext_dir, 0777, true);
 
     $this->extractTo($extension, $ext_dir);
+
+    // clean up
+    rmdir($temp_dir);
+    
     return $ext_dir;
   }