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

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

rec {
  firefox = common rec {
    pname = "firefox";
    ffversion = "91.0.1";
    src = fetchurl {
      url = "mirror://mozilla/firefox/releases/${ffversion}/source/firefox-${ffversion}.source.tar.xz";
      sha512 = "9388789bfe3dca596542b082d0eca7b1a6d1bbbf69eb97cc445f563d1a5ff0c9b530f3be02ee290805e311b0fcb392a4f5341e9f256d9764a787b43b232bdf67";
    };

    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-91 = common rec {
    pname = "firefox-esr";
    ffversion = "91.0esr";
    src = fetchurl {
      url = "mirror://mozilla/firefox/releases/${ffversion}/source/firefox-${ffversion}.source.tar.xz";
      sha512 = "e518e1536094a1da44eb45b3b0f3adc1b5532f17da2dbcc994715419ec4fcec40574fdf633349a8e5de6382942f5706757a35f1b96b11de4754855b9cf7946ae";
    };

    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; [ 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-91 ];
    updateScript = callPackage ./update.nix {
      attrPath = "firefox-esr-91-unwrapped";
      versionSuffix = "esr";
      versionKey = "ffversion";
    };
  };

  firefox-esr-78 = common rec {
    pname = "firefox-esr";
    ffversion = "78.12.0esr";
    src = fetchurl {
      url = "mirror://mozilla/firefox/releases/${ffversion}/source/firefox-${ffversion}.source.tar.xz";
      sha512 = "646eb803e0d0e541773e3111708c7eaa85e784e4bae6e4a77dcecdc617ee29e2e349c9ef16ae7e663311734dd7491aebd904359124dda62672dbc18bfb608f0a";
    };

    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-78 ];
    updateScript = callPackage ./update.nix {
      attrPath = "firefox-esr-78-unwrapped";
      versionSuffix = "esr";
      versionKey = "ffversion";
    };
  };
}