Consider the attached files as obsolete.
I would like to report that the recently updated version of Custom Buttons add-on published on AMO (addons.mozilla.org) named 0.0.5.8.1-signed.1-let-fixed is not really fixed. It's still broken on all Firefox versions higher than 43. The problem is that all instances of the const keyword inside the custombuttons.jar file have not been changed.
Also, the Browser Console is not working properly on Firefox versions higher than 43. When one clicks on a warning/error link thrown by a custom button, it doesn't open the CB editor with the highlighted line.
Both errors mentioned above are fixed in the attached files on this post. I just modified two things:
- All instances of the const keyword are replaced by the var keyword. Including the files inside the custombuttons.jar file.
Rename the .zip file extension to .xpi to install.