Does anyone know if it works properly on any older version of Firefox?

[soyelfede]

I really need to use this addon, but with the lack of updates I have many problems: highlighted text appears on pages that are not bold, and pages that are bold do not show highlighted text. In short, I end up going through all the pages. Huge job that before, when it worked, I didn't have to do.

Does anyone know if it works properly on any older version of Firefox? In that case I would look for it and install it with pleasure