I'm on Kubuntu, Firefox 3.5.
8 Answers
You're on Firefox 3.5, right? Then Sathya's solution is wrong.
According to the site he linked, the flag you must create shall be called
network.protocol-handler.expose.magnet
not network.protocol-handler.*external.*magnet, as he suggested.
Besides, you can initialize it to false and thus Firefox will ask you the program which you want to use. I just did it and it worked - no need to restart Firefox.
If KTorrent won't support Magnet Links, you might try qBittorrent, which I'm using succesfully.
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Setting it to false really did bring up the dialog box for me to choose it. Thanks! – agentofuser Dec 18 '09 at 19:25
Type about:config into the address bar and press Enter.
Next, Add a key by Right-click -> New -> Boolean -> Name:
network.protocol-handler.external.magnet
with value -> true
Add another key, by Right-click -> New -> String -> Name:
network.protocol-handler.app.magnet with Value -> ktorrent
Also, do ensure that the key network.protocol-handler.expose-all is set to true.
From Mozilla KB
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Thanks! It's weird, but I did what you said and I'm still getting "Firefox doesn't know how to open this address, because the protocol (magnet) isn't associated with any program", even after restarting Firefox. Do you know why that could be? – agentofuser Sep 21 '09 at 15:29
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This worked for me, FF 47, Debian 9, KDE 5:
1. In about:config find "network.protocol-handler.expose-all", change to "false";
2. Click on some magnet link - a file browser pop-up should appear, show it full path to the executable (/usr/bin/qbittorrent for ex.);
3. Change "network.protocol-handler.expose-all" back to "true";
4. Download the world.
I was using gentoo + Firefox 19. When I had the problem, adding stuff to 'about:config' won't help and I don't see "Magnet" under Preference -> Applications. Eventually I found the problem and it may have something to do with the KDE mime type configurations.
I changed /usr/share/applications/kde4/ktorrent.desktop by appending: x-scheme-handler/magnet; to 'MimeType=xxx'
Then I edited ~/.local/share/applications/mimeapps.list by inserting the line: x-scheme-handler/magnet=kde4-ktorrent.desktop
Then, if I click on an magnet link, firefox will pop up a dialog asking what application to use instead of saying not understanding protocol. After the pop up, you need to select ktorrent's binary (/usr/bin/ktorrent on my computer).
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what happens after firefox pops up? Do you do something else? If not, then this isn't an answer. – Lizz Mar 25 '13 at 06:07
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Oops. Sorry for missing out that part. Just edited. Thanks for the remind. – Steven Lai Mar 25 '13 at 07:00
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nice and most correct answer, but will be erased on update, need to pull request ktorrent or open bug... so answer from @bruhal is quicker and will last – intika Apr 23 '18 at 09:23
ktorrent does not support uri links, by the way. http://ktorrent.org/wiki/index.php/FAQ#Does_KTorrent_support_magnet_links.3F i myself followed the sathya suggestion and i've had the same issue as you, obvio171. i'm running archlinux firefox 3.5.5-1 should we file a bug?
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2According to https://bugs.kde.org/show_bug.cgi?id=214375 the support is going to come in the next feature release of KTorrent. – che Dec 10 '09 at 11:43
Because you should include the path of the Application on the network.protocol-handler.app.magnet "/Applications/kTorrent" instead of the app name