> Slack refuses to work properly on Firefox. I don't think they care that we are being loud about it.

Microsoft Teams doesn't make calls on Firefox, and their poor excuse of a desktop client for Linux forces me to use the web app on Chromium on my work computer.

Big shout out to Webex Teams, who's web app works flawlessly on both Chromium and Firefox but actually provides a better experience on Firefox because it's easier to make video calls Fullscreen

It's funny because I find if I get my sites working properly in Firefox, they work everywhere.

Yep. This is why I request (though I don’t enforce) my front end team to use Firefox at least part of the time when developing; if it works there, it works basically everywhere else without any hassle.

Microsoft teams barely even work standalone. It frustrates me whenever all the buttons stop working when I need to unmute myself during an online meeting. I then have to use my phone and hope it won't happen there too.

</rant>

To be fair, I'm not even sure if Slack cares about web users at all. It just doesn't work that well, at least for me. (Though I obviously haven't tried it in a bit, so maybe it's good in Chrome now.)

I think the desktop slack app is built on electron so is built to render properly in chrome.

It's true, but the Electron app always seemed more full featured, and at least for me, I had lots of issues with bugginess and slowness in the web browser, even in Chrome. I'm not sure why it would be slower in Chrome than Electron. Neither are particularly lightweight. Maybe it's my fault somehow.

With Electron you can depend directly on native libraries for handling audio and whatnot, but I don't think that explains the whole picture.

One datapoint: I use Slack exclusively in the browser (both Firefox and Brave), and it works well. As far as I remember on Firefox there was some limitation on video calls but that was arbitrary (user-agent check or something like that).

Yes, it is just video calls.

I hadn't tried the user agent trick, I was just frustrated enough at being on my personal laptop and having to join a call then finding Slack was being terrible.

And for no apparent good reason other than bad quality software.

I only brought it up because it is high profile web application that has an arbitrary Firefox limitation, and as a Firefox user I will name and shame bad applications.

Slack doesn't work properly full stop. It's a bloated unstable mess on every platform. Discord puts it to shame.

What doesn't work properly and are there issues for this where I can add my support?

I'm using slack on Firefox daily. Prefer it over loading that slow and resource hungry desktop app, if only for speed alone. But haven't encountered stuff that works on the desktop app, but not in the browser.

It refuses calls as "not supported in this browser".

Are you user-agent spoofing?

I'm also using Slack on Firefox and I'm not doing any user agent spoofing.

Calls?

That's what I had issues with, and what has been confirmed by multiple other people in this thread unless you spoof your user agent.

I've never used calls. Never even considered using it. So could be that feature isn't working.

For the rest, slack works well enough on FF. Often faster than the desktop app because the latter is so resource hungry, it becomes slow.