By default, you will be prompted to save to your Downloads Folder
Click on the downloads dropdown at the top right corner of FireFox and click on ZIPReader.exe
Click Run to confirm you wish to run the program
Agree to the End user License agreement options
Click on Select archives to Extract
Now, tell the ZIP Reader where your zip file is. Click on Desktop, click on the zip file you are working with and click Open. If the zip file is on a CD or DVD drive, scroll down and double click on that drive.
If your zip file was encrypted, enter the password or passphrase
If the password or phassphrase is correct, then your files will be extracted along with a notification