Slack and Firefox multi-container account in conflict

Post date: 2021-03-02 14:42:42
Views: 170
My work Slack account suddenly won't open in my Firefox work container after having no problems doing so for the past few months.

I installed the Firefox Multi-container add-on. Everything with it has been fine until today. I have a number of containers (personal, work, etc.). I tend to leave my tabs open and my containers sorted by grouping. One of the containers that's always open in my work group is Slack for browsers, and it is signed in to my employer's Slack account.

Today, when I fired up the computer (I power it down at nights) and launched the browser (FF 86.0) Slack wouldn't open at all. I tried refreshing. I tried closing the tab and reopening a new one, and nothing. I've got a completely white screen. (I do have the Slack app and resorted to that, but it's not my preference for everyday activities.)

Tonight, I decided to play around a bit to figure out what the problem was. It turns out I can make Slack load in my browser, as long as it's in a completely different (i.e. non-work) Multi-container grouping. Right now, for example, it's loaded in my "personal" grouping.

As far as I know, I did nothing to block it from loading in the work group, but it's computer, so something could have happened in the background.

The questions are what do I need to check and how do I get Slack working again in the work group?
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