I updated to Firefox 57 and I was looking for a WebExtension replacement for CheckFox, since I was not able to find one, I implemented it. CheckThemAll allows you to select many checkboxes and then check / uncheck / invert them with one single click!

Instructions:

1) Select an area of your page containing the checkboxes you want to check/uncheck/invert
2) Right-click and use one of the features available in CheckThemAll

Note: expand the selection to include the "first" checkbox

Install

• License: Mozilla Public License 2.0
• Weekly downloads: 40
• Average daily users: 2125
• Rating: 4.2903/5 of 31 ratings
• Created: 2017-11-17 09:35:55
• Last updated: 2017-11-22 11:00:20
• Homepage: https://github.com/SalvatoreMeschini/CheckThemAll
• Support site and email
• Orig: https://addons.mozilla.org/en-US/firefox/addon/checkthemall/
• API: {ef462a4f-5c3a-4781-a453-23ad6fb08fd1}