Firefox ESR excluded by GoToMeeting--workaround?

Couldn’t join a webinar because “This browser is not supported” by GoTo. Using openSuSe 15.4 with the current FF (91.10esr). The release number is not within 2 versions of the latest so GoTo blocks me from joining. [Not going to Chrome.]
Is there a workaround to use GoToMeeting? I hesitate to install the latest FF from another source, but has anyone succeeded installing the latest not from openSuse?

You could override the default firefox user agent…

create a new entry of type string named “general.useragent.override”
set to the following value “Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0”

will make it appear as if you’re using version 102

Or download the tar.bz2, unzip it and start firefox in your /home…

But for that, I would start it with a new profile.

Thank you. Problem solved.

And how???

User can install and use latest FF together with ESR FF
Firefox 102.x will replace 91.x as ESR in the nearest future: