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Best Firefox Extensions?
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A place to discuss the news and latest developments on the open-source browser Firefox
I can't speak for Sidebery, but Firefox's own Multi-Account Containers extension indispensable. Give it a try (maybe without Sidebery enabled in case it causes conflicts) and you'll notice how much it helps with managing multiple Azure accounts and other general browsing isolation. Particularly useful is the "always open this website in this container" feature.
There was a reason I switched to Sidebery over The native implementation but I can't remember. Maybe it was the Panels feature that FF Containers didn't offer at the time.
I do miss some of the functionality of the Mozilla add-on though, I don't think they opened up APIs to some of the extended tab/window options.