All the incognito browser windows share the same “session” in Firefox. So say you open an Incognito window to browse Facebook or something, then you open another Incognito window, this new incognito window is linked to the previous incognito window, meaning you are logged into Facebook at that new Incognito window as well. This is because, as I explained before, all the incognito windows share the same “session”

The only way to clear incognito window is to close ALL of them and then create a new incognito window. You dont have to close the main non incognito Firefox window though, just close all the incognito windows. Then open a new one, now your previous session is destroyed and you are new again.

You may know it but its not that common knowledge as it should have been

115 points

If you want every tab to have its own session use temporary containers

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-8 points

That would be a nice thing to have

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96 points

You do have it - look up container tabs

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55 points
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There’s no “would be” about it, this is just an actual feature of Firefox

https://support.mozilla.org/en-US/kb/how-use-firefox-containers

edit: unless you mean specifically disposable ones for which there is an add-on

https://addons.mozilla.org/en-US/firefox/addon/temporary-containers/

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1 point

Do you know if this is available for Android’s Mull?

I’ve tried looking for the option but haven’t found it.

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24 points

Mozilla has an official addon for it. Very easy.

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5 points
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And it works with hidden tabs, and thus by extension, with the tab groups add-on.

I have a whole group of tabs for uploading add-ons that have their own session, and the group’s behavior is persistent. And I can switch to them on the fly. When not in use, I don’t see them there at all.

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-7 points

Yes it really would been. The temporary is not updated for 3 years so that is quite abandoned.

Firefox some native but they feel more a solution to keeping data you want separate from each other instead of just having a way to isolate then remove.

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86 points
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Maybe it’s because I have a programmer mentality but this is exactly the behavior I would expect, otherwise the "open link in new window"won’t work reliably, all popups would fail and you couldn’t “tear” off a tab in a new window

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7 points

So, safari in ipadOS (that’s the only place I use safari) works the same way, and it’s as annoying as it sounds.

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6 points

Though I must say as a dev, being able to use 3 different safari windows for 3 different accounts to test is wonderful, instead of needing multiple browsers.

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2 points

You are someone who knows how Browsers work so you think this way.

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70 points

I use containers for everything. Best thing Mozilla has ever done.

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3 points

I just wish the containers were by domain by default and automatic.

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2 points

I love your username.

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1 point

My dyslexia likes your username!

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64 points

For me that behavior was expected. E.g. if I open a link from incognito in a new window, then it obviously should also use incognito but share its context with the previous sessions, otherwise it would require you to login over and over again. If an independently opened incognito window behaved different from a link-click window, I’d find it even more confusing.

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13 points

I would say it should be the opposite. Separate windows should be independent but tabs on other hand can share same session.

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8 points
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3 points

Nah, what if you drag a tab from one window to another.

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5 points

yeah that seems intended and obvious to me as well

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5 points

In fact, that’s a good way to understand the behavior. Log into a site. Visit the site in your other window. If they share a session, you’ll be logged in. If they don’t, you’ll be logged out.

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1 point

Engineer level understanding. Sometimes, you have to make sacrifices for functionality. I’d hate to be on the receiving end of the “bug” reports if every tab were sandboxed and sanitized across domains. Nothing would work.

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59 points

This isn’t well known?

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9 points

Wish it was

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10 points

IDK how else it could work.

Anyone who understands what a private window actually does, would expect it to work this way.

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