is it just me?
When i’m logged in the forum and open a thread in a new tab, i’m not logged anymore? I think it may have started two weeks ago.
Running Firefox 133.0.3 in default inkognito-mode with no crossite-cookies/isolated other cookies, prefending tracking, known/supected fingerprinting, cryptominers.
It may be due to incognito mode. I just opened this thread in a new tab and remained logged in, but I don’t use the forum in incognito mode.
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I think - I recall something about configuring the browser to alway use incognito or to select opening a link in incognito.
When doing so the offline part of the forum is not used but you are starting from scratch.
well, just changed all settings to default and cleared history etc. but still got the same behavior… strange
think i will try to setup firefox from scratch…
Update: It was uMatrix’s fault. Despite the fact that everything was allowed for *.manjaro.org, it seems to be blocking something.
That add-on is very old, and is no longer actively maintained. Its GitHub page states:
This repository has been archived by the owner on Jul 21, 2021. It is now read-only.
From what I have just read on a few Reddit threads, a lot of uMatrix’s features have been rolled into uBlock Origin, which is actively maintained by the same developer.
If you install uBlock Origin, you may have to enable “I am an advanced user” in uBlock Origin’s settings page to see the features that were available in uMatrix.
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Note that umatrix has been umaintained for a while and the source is currently archived.
Also, with a properly configured ublock:origin extensions such as umatrix and noscript are redundant.
EDIT. Ha, speedy @scotty65
But
This wont do it - at least it wont give you the ability to block 3rd party scripts/frames by default.
What you are looking for instead is something like
* * 3p-script block
* * 3p-frame block
In “My Rules”.
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I’d guess that something in your Firefox security settings, or the settings of an addon, is blocking/deleting the site’s session cookie.
Isn’t -inkognito-mode- Incognito Mode designed and intended to do exactly that i.e. have a completely isolated “session” per tab or browser instance? 
Disclaimer: I have never used this feature, so can’t confirm or otherwise, what its behaviour is.
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With Firefox’s private browsing feature, cookies are only stored in the memory, not written to disk. Everything from the session (cookies, history etc) is wiped when the private browsing session is closed.
So, a user who logs into a site while private browsing should be able to browse normally, including opening multiple tabs which can access the cookies that were set when they logged into the site.
Edit: I just opened a private browsing session in Firefox, logged into the forum, and opened several topics in separate tabs. I remained logged in on every one of those tabs (I’m actually doing this edit from one of those private browsing tabs).
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That’s interesting to know, thanks.
I just wonder why people feel the need to use these things though, as I can see no advantage?
At least, not in my use-case.
Easy enough to clear cookies (preferably selectively, e.g. if you get annoying ones) and maybe, if so desired, history (likewise)?
It can be very useful if you have guests who want to browse the web, check their emails etc. They can open a private session, do their stuff, and it is all wiped when they close the browser. Their information remains private, and your cookies, history from normal browsing sessions etc aren’t impacted in any way.
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It must be a local configuration causing it.
I just conducted a test using [root tip] Topic Collection List View and I can open in new tabs - no loss of login.
Rightclick link → open in new tab → cannot reproduce → I suggest you look at your addons - one of them is causing the behavior.
You could disable all - then reanble one-by-one until you know the culprit
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Problem found and (I hope) dealt with.
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I create a new directory called /tmp/guest and run
firefox --no-remote -profile /tmp/guest
The name of the directory can be anything you like. As long as it’s in /tmp/ it gets deleted upon reboot.
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I guess if you wanted to do an online financial transaction or something similar, especially if it’s a shared machine…
Otherwise I find it rather OTT…
However, even when using Windows XP in netshops, I would always create a profile and delete it when done.
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It has to be remembered that Firefox isn’t just a Linux app, so it is preferable to have features that work the same way across all platforms. Private browsing does that - it is just as easy for a Windows user, or an Android user, to start a Firefox private browsing session as it is for a Linux user.
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Thanks for the hint.
That was exactly the reason why I stayed with uMatrix. I like the option of being able to select exactly which elements should be blocked/allowed. uBlock Origin looked too much like a black box to me.