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Why are ctrl+alt+<key> shortcuts blocked in librewolf (rfp)

I've written a web app that uses ctrl+alt+<key> shortcuts because they don't interfere with the many expected ctrl-<key> shortcuts. Librewolf blocks these shortcuts because of RFP, apparently. As a result I have to disable RFP for my site (or just be annoyed all the time), and I guess I'll have to advise my users to do the same.

I haven't found any doc that explicitly discusses the justification for disabling alt shortcuts. There is a bug about how ctrl-<key> was broken for a while. This page doesn't mention alt either, that I can find.

I can guess that it probably allows identifying some keyboards somehow. Just would like to read up on it so I can at least understand what the issues are with the alt key.

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4 comments
  • As a result I have to disable RFP for my site (or just be annoyed all the time), and I guess I’ll have to advise my users to do the same.

    Is there any reason you can't change your keybinds to something other than CTRL+combo? You explained it's to keep from interfering with other common binds but there's still a ton available to you when taking those into account.

    It's your hill to die on but I wouldn't make my website usability dependent on a browser that is so rarely seen.

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