Install TamperMonkey on your Firefox browser first if you haven’t done yet. It should be as easy as any add-on install. TamperMonkey support Firefox Quantum, so it should have no problem running on the latest Firefox version. You should notice the TamperMonkey icon is added in the toolbar once you have it installed.

Add New User Script

The easiest and fastest way to install a new user script in TemperMonkey is… copy paste. First create a new user script in TamperMonkey.

Then just paste the full code of the user script you have / download into the text box and save. Remember to click save after you paste the code.

Done!

 

Edit / Update User Script

First, open the TamperMonkey dashboard which can be access from the TamperMonkey icon in the toolbar.

Second, find the user script you want to edit or update, click on the edit action icon / button.

Then just paste the full code of the user script you have / download into the text box and save. Remember to click save after you paste the code.

Done.

 

Resources

Don’t know how to copy user script from GitHub? Read this post.