{ stdenv, lib, callPackage, fetchurl, fetchpatch, nixosTests }:

let
  common = opts: callPackage (import ./common.nix opts) {};
in

rec {
  firefox = common rec {
    pname = "firefox";
    ffversion = "89.0";
    src = fetchurl {
      url = "mirror://mozilla/firefox/releases/${ffversion}/source/firefox-${ffversion}.source.tar.xz";
      sha512 = "5089720feda15d054d0aa4c3bdeb84760314dadd6381d7360e688d8e396154868220c6315add650d8d2a42652cb8a9bfeb833885812ef0bd70a74ee58ad18aa3";
    };

    meta = {
      description = "A web browser built from Firefox source tree";
      homepage = "http://www.mozilla.com/en-US/firefox/";
      maintainers = with lib.maintainers; [ eelco lovesegfault hexa ];
      platforms = lib.platforms.unix;
      badPlatforms = lib.platforms.darwin;
      broken = stdenv.buildPlatform.is32bit; # since Firefox 60, build on 32-bit platforms fails with "out of memory".
                                             # not in `badPlatforms` because cross-compilation on 64-bit machine might work.
      license = lib.licenses.mpl20;
    };
    tests = [ nixosTests.firefox ];
    updateScript = callPackage ./update.nix {
      attrPath = "firefox-unwrapped";
      versionKey = "ffversion";
    };
  };

  firefox-esr-78 = common rec {
    pname = "firefox-esr";
    ffversion = "78.10.1esr";
    src = fetchurl {
      url = "mirror://mozilla/firefox/releases/${ffversion}/source/firefox-${ffversion}.source.tar.xz";
      sha512 = "a22773d9b3f0dca253805257f358a906769d23f15115e3a8851024f701e27dee45f056f7d34ebf1fcde0a3f91ec299639c2a12556e938a232cdea9e59835fde1";
    };

    meta = {
      description = "A web browser built from Firefox Extended Support Release source tree";
      homepage = "http://www.mozilla.com/en-US/firefox/";
      maintainers = with lib.maintainers; [ eelco hexa ];
      platforms = lib.platforms.unix;
      badPlatforms = lib.platforms.darwin;
      broken = stdenv.buildPlatform.is32bit; # since Firefox 60, build on 32-bit platforms fails with "out of memory".
                                             # not in `badPlatforms` because cross-compilation on 64-bit machine might work.
      license = lib.licenses.mpl20;
    };
    tests = [ nixosTests.firefox-esr ];
    updateScript = callPackage ./update.nix {
      attrPath = "firefox-esr-78-unwrapped";
      versionKey = "ffversion";
    };
  };
}