The best extension to easily export to pdf file (or other formats of your choice), either entire webpage, selection or visible part. I use it all the time. Thanks for a fabulous extension.
I also had trouble installing in it Firefox 60.0 but found FireShot_0.98.94.11.exe on the internet and downloaded it. Removed my existing Fireshot extension first, then closed Firefox and installed the exe file. Worked a treat and I hope this will help others who have trouble installing it in the new version of Firefox.
(In the installing process you can choose which browser(s) Fireshot will be installed into.)