Mozilla sent Firefox Version 72.0.2 to the release channel today. The update fixes various issues as well as including stability fixes.
Also released was Firefox ESR Version 68.4.2
Release Notes (https://www.mozilla.org/en-US/firefox/72.0.2/releasenotes/)
should i download this as a back up browser? laptop windows 10
You have Microsoft Edge as a backup. You can get extensions for it from the Microsoft Store such as uBlock Origin, Scroll To Top Button, F.B. Purity (for cleaning up Facebook) and others. But, it is your PC, your choice. :)
By the way, since you're new to Microsoft Edge, G, you may find this helpful since it illustrates how to install extensions on Edge and also includes some you may be interested in: Five Extensions for Microsoft Edge and How to Use Them (https://www.groovypost.com/howto/the-5-essential-extensions-for-microsoft-edge-and-how-to-use-them/).
thank you