You're most welcome. Version 122 Firefox can be made to use with Windows 7 by using some libs from the r3dfox project and a version number hack. As for the r3dfox itself, works "natively" on Windows 7 which means it does not need any tweaks or hacks. Plus it has some useless stuff bundled in Firefox removed example: maintenance service and some other stuff. Developer was also interested in removing telemetry, howto is available on the issues section of r3dfox github but doesn't seem to be applied yet. Maybe more users need to post on their github and push the dev to do it ? r3dfox Version 123 is also available to download from their gihub repo but having some performance issues on some specific processors and dev reportedly working on it so I'll be waiting for a fix before I update but afar from that 122 works very well and with UI Fix it's far more better experience than Chrome based browsers.
What services use Widevine ? Unlike Chrome based browsers, User agent spoofing is on Firefox is foolproof. If Widevine doesn't need those Windows 10 specific exotic API's, than it's easy to fool the Firefox into reporting Windows 10.
Interessant. Here in France most of live streams comming from TV broadcasts are Widevine scrambled (TF1 group, M6 group, BFM group). FYI widewine is out too on Seven even with latest Firefox / Chrome derivatives (Supermium, Mypal68 ...)
Interesting ! Does auto-updating work once it's installed or it's necessary to use CFF Explorer to manually update ?
Normally no. A well-coded portable version of a program will keep its settings in a separate .ini file for example and not the registry. That way it won't interfere with settings of a regular installed version.
I don't understand. Why do you want to run this software on the same computer. Pick one & stick with it. Or do not use portable on anything you run an installed version on. It would seem, based on your original comment & the version numbers, that these two versions are miles apart on top of being 2 different pieces of software created for 2 separate jobs. Use them for what they were designed for; just not on the same computer together. ;>((