Firefox 64-bit - version 52.0b9 (Beta 9) is released
2017-02-24  link

Firefox 64-bit - version 52.0b8 (Beta 8) is released
2017-02-21  link

Firefox 64-bit - version 52.0b7 (Beta 7) is released
2017-02-17  link

Firefox 64-bit - version 52.0b6 (Beta 6) is released
2017-02-13  link

Firefox 64-bit - version 52.0b5 (Beta 5) is released
2017-02-10  link

Firefox 64-bit - version 52.0b4 (Beta 4) is released
2017-02-07  link

Firefox 64-bit - version 52.0b3 (Beta 3) is released
2017-02-03  link

Firefox 64-bit - version 52.0b2 (Beta 2) is released
2017-01-30  link

SeaMonkey 64-bit - version 2.48 (Unofficial Nightly) is released
2017-01-29  link

Firefox 64-bit - version 51.0.1 is released
2017-01-25   link

Thunderbird 64-bit - version 54.0a1 (Nightly) is released
2017-01-24   link

Firefox 64-bit - version 51.0 is released
2017-01-23   link

Alternatives

  1. Cyberfox 64-bit
  2. Waterfox
  3. Pale Moon 64-bit
  4. Brave browser
  5. pcxFirefox 64-bit
  6. fbuild.com (for Intel 64 + AVX2, for Intel 64, for AMD64)
  7. Light, a light firefox