FB 3.0.0-beta.2.xpi: installation refused by FF 44.0a2, despite turning xpinstall... to false

[cFreed-AKA-Alf]

I read the previous issue pointing this, but I saw that the most recent alerter didn't get a response since October 27, so I prefer to open a new one :)

I'm on Win 7.
I also tried turning all other xpinstall... options to false, without success.

Any solution?
Thanks in advance.

[janodvarko]

Hi, can you post a link of the XPI you are trying to install?

Thanks
Honza

[cFreed-AKA-Alf]

Hi Honza,

I'm using this link: firebug-3.0.0-beta.2.xpi, found at the release notes page.

It results in displaying the FF message:

However here is the involved part of my about:config:

Thanks for helping
Fred

[janodvarko]

I guess the first message is this one (in English), correct?

This happens to me if I use the link and copy it into the address bar directly and press the Enter key.
If I open: https://github.com/firebug/firebug.next/releases/ and click on the link it works for me (I don't really now what the difference is)
I just need to allow the installation, see the next screenshot:

Then it downloads and installs without a problem.

Does this work for you?
Honza

[cFreed-AKA-Alf]

Thanks a lot: this way, it works!

And yes, when it didn't work I had copied the link into the address bar. It comes from the fact that I was using a separate (standard 42.0) FF instance for navigate through information, while trying to install FB3 on my 44.0a2 FF instance.

FYI note that using your suggested way I didn't even get the intermediate message you reported, and hence had not to allow the installation: it happened directly as usual.

I can't figure out why it doesn't work when pasting the link into the address bar, and something else puzzles me: did you notice that the deny message says "Firefox Developer Edition prevented this site from asking you..."?
Maybe I'm too punctilious but I wonder why FF talks about a site, as if there was kind of indirect action, while it's clearly a browser's user direct invokation to the given address.

Anyway, thanks again.
Fred