Updated info using WebEx under opensuse 42.3

I have been informed that an international meeting scheduled for the beginning of July will take place “virtually using Webex” due to COVID.
Now I am quite confused about the requirements … it looks like there is no executable for linux and it should run from a browser like chrome or firefox (none of which is my preferred, but I already use chrome for Gsuite meetings inside my institution). It is unclear to me whether this requires advance installation of a browser plugin, or will it install it first time, or requires none at all.

Since the laptop I have at home is definiely too limited, I’d like to attend the meeting from my institute, which these COVID days requires to get special clearance to access physically. I did some tests in ssh from home onto my office machine with DISPLAY set to 10:0, with **firefox 60.0.2 and chrome 71.0 **(the office machine is a openSUSE Leap 42.3, uname 4.4.132-53-default #1 SMP Wed May 23 06:57:07 UTC 2018 (036cd2f) x86_64 x86_64 x86_64 GNU/Linux)

Accessing https://www.webex.com/test-meeting.html says unsupported system or browser, despite the fact https://help.webex.com/it-it/9ehuwu/Web-App-Supported-Operating-Systems-and-Browsers says the requirements are Linux ubuntu 14.x suse 13.x or greater, firefox 48 chrome 65 or greater, chromium with limitations, so should be satisfied

A web search shows old and contradictory articles (dated 2016 or earlier, some say an OpenH264 Video Codec plugin is needed, some say it is already included in firefox, some say 32-bit libraries (unclear if a 32-bit browser too) are needed.

Does anybody have up-to-date information about using Webex inside a browser under OpenSuse ?

If installation of additional packages is required, I prefer to do this in person in front of thre machine, not via ssh, so I have requested access to the institute next Monday 22 (a week in advance on the meeting start) so if anybody suggests a solution before then it would be much appreciated.

As openSUSE 42.3 is out of support for some time, I assume that “up-to-date information” will never mention it.