Copper with firefox 52 on raspberry pi3

[Shellkan]

Hi,
For a school project i need to use Copper with firefox on a raspberry Pi 3B with ubuntu mate.
To use Copper, i downgraded firefox to firefox 52. Then i followed instructions to install copper but any Add ons appear on firefox.
I don"t what is wrong, so i need help...

Sorry if my english isn't very correct, i'm a french guy =)

[Matthias Kovatsch]

Have you read https://github.com/mkovatsc/Copper#not-supported-by-firefox-56--webextensions-api?
The about:config steps are important ;)

[Shellkan]

yes i did.

What i`ve done :

1.Downgrade firerox to firefox 52.02(32 bit)
2.Download Copper directory
3.Create the [e-mail] file like this (see image)

4.My Copper directory is in my Download directory, so i have edited the file like this :
~\Téléchargements\Copper\
5.Then I have allowed unsigned add-ons:

6.Finally i restart firefox but i have this message in extensions field
you don't have any add-ons of this type installed

[Matthias Kovatsch]

Have you disabled auto-updates? It updates very persistently if you are online.. maybe double-check your current version.

I haven't worked on this in a while. Double-check if the trailing slash in the path makes a different. And at some point, an "autoreg" file was needed. Maybe you can retry with version 55.

[Shellkan]

yes, auto-update is disable,my firefox is still in version 52.
I already tried with differents path...
~\Téléchargements\Copper\ and ~/Téléchargements/Copper/ and ~\Téléchargements\Copperbut the issue is the same :/
i wanted to install version 55 but i only found a 52 version for a raspbian system...

And what about autoreg file ? what is this and how find it ?

[Shellkan]

Finally i found the problem, my bad.
the [e-mail] file wasn't at the good place. I have installed it at ~/.mozilla/firefox/xxxxxxxx.default/ instead of ~/.mozilla/firefox/xxxxxxxx.default/extensions/.
Then have to replace back slash by normal slash for the path to the Copper sources.
Now Copper is available.

[Ameer Haziq Bin Osman]

Hello Shellkan, I'm having the same problem as you are at the moment and I was just wondering what you did after typing the pico command to make the [e-mail] file. I'm redirected into the GNU nano terminal and I was wondering if you changed the file or anything. Thanks for your help.