Did you know you can unzip any ZIP file by Firefox itself?
You may extract selected ZIP file from Unzip toolbar button.
Toolbar button is auto loaded in Firefox UI. Press toolbar button, select ZIP file and it extract for same folder where ZIP file is. Finally it will open extracted directory if you want.
You know Firefox is browser not a Archive utility. Use small zip files because big files can slow it down Firefox. If Firefox hangs when ZIP extraction, stop the script.