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cannot delete this, whether it's a cookie or not: about.ef2a7dd5-93bc-417f-a698-142c3116864f.mozilla

  • 4 replies
  • 0 have this problem
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  • Last reply by mydiylife

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about.ef2a7dd5-93bc-417f-a698-142c3116864f.mozilla This ‘cookie’ (no size shown) has been showing up on my Firefox ‘manage website data’ since at least March ’23 and it will NOT delete. It may not be 'a real cookie' but I still can’t get rid of it.

When I searched online for that apparent address I found: https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/40175 The info near the top of that site’s page: Torbutton INFO: tor SOCKS: http://expyuzz4wqqyqhjn.onion/static/images/home/png/block-trackers@3x.png?h=70991bcb via --unknown--:cc55771ba6d6e8c6542066863a47e223 SOCKS is a username? And the ‘onion/hidden service’ address cannot be accessed unless using the Tor browser? So that seems a dead end for me.

I have seen 3 other people posting here in the past year about this particular cookie. hobro1 did an uninstall & still had to remove directories manually after getting some answers from several others. blazee decided – based on the answer given by jscher 2000 – that it probably wasn’t dangerous. mekishev 1 received an answer from cor-el that is incomprehensible to me, except for saying ‘it isn’t a real cookie’. I understand it may not 'a real cookie' but then why is it showing up in 'manage website data' where everything else is a cookie?

Can anyone help, please? I’m about to migrate over to a new computer and really don’t want to take this with me. I don’t like the fact that it persists, and that the cookies ‘keeper’ – SOCKS maybe? – is completely hidden.

Thanks much in advance for any assistance!

PS The only possible explanation I've come up with for how it got this cookie is when I was checking out some Firefox extensions; I didn’t even know what Tor was till trying to figure this out.

about.ef2a7dd5-93bc-417f-a698-142c3116864f.mozilla This ‘cookie’ (no size shown) has been showing up on my Firefox ‘manage website data’ since at least March ’23 and it will NOT delete. It may not be 'a real cookie' but I still can’t get rid of it. When I searched online for that apparent address I found: https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/40175 The info near the top of that site’s page: Torbutton INFO: tor SOCKS: http://expyuzz4wqqyqhjn.onion/static/images/home/png/block-trackers@3x.png?h=70991bcb via --unknown--:cc55771ba6d6e8c6542066863a47e223 SOCKS is a username? And the ‘onion/hidden service’ address cannot be accessed unless using the Tor browser? So that seems a dead end for me. I have seen 3 other people posting here in the past year about this particular cookie. hobro1 did an uninstall & still had to remove directories manually after getting some answers from several others. blazee decided – based on the answer given by jscher 2000 – that it probably wasn’t dangerous. mekishev 1 received an answer from cor-el that is incomprehensible to me, except for saying ‘it isn’t a real cookie’. I understand it may not 'a real cookie' but then why is it showing up in 'manage website data' where everything else is a cookie? Can anyone help, please? I’m about to migrate over to a new computer and really don’t want to take this with me. I don’t like the fact that it persists, and that the cookies ‘keeper’ – SOCKS maybe? – is completely hidden. Thanks much in advance for any assistance! PS The only possible explanation I've come up with for how it got this cookie is when I was checking out some Firefox extensions; I didn’t even know what Tor was till trying to figure this out.

Chosen solution

This about.ef2a7dd5-93bc-417f-a698-142c3116864f.mozilla cookie is used to set a firstPartyDomain for about: pages, so is only used internally and no need to worry about.

// Unique first-party domain for separating about uri.
#define ABOUT_URI_FIRST_PARTY_DOMAIN "about.ef2a7dd5-93bc-417f-a698-142c3116864f.mozilla"


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mydiylife said

when I was checking out some Firefox extensions

Can you retrace your steps and get it to appear in a new profile?

You can refresh your existing profile if it bothers you.

If you don't mind getting your hands dirty, you can try deleting the cookie database files (cookies.sqlite) in your profile folder.

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zeroknight, thanks for your reply – with suggestions.

Decided to try refreshing Firefox profile first, but on way to doing that I tried troubleshooting mode as that only temporarily disables extensions etc.

Nope, the (not)cookie is still there after trying to delete it.

Will try the refresh solution later.

So you really think this is just an annoyance (you wrote 'if it bothers you')? Have you ever had something you couldn't make go away on your own device/s?

Again, thanks for the reply! At least now I have more ideas about what to try next.

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Chosen Solution

This about.ef2a7dd5-93bc-417f-a698-142c3116864f.mozilla cookie is used to set a firstPartyDomain for about: pages, so is only used internally and no need to worry about.

// Unique first-party domain for separating about uri.
#define ABOUT_URI_FIRST_PARTY_DOMAIN "about.ef2a7dd5-93bc-417f-a698-142c3116864f.mozilla"


Modified by cor-el

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Thank you cor-el!

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