Firefox 64-bit - version 67.0. is released
2019-05-20   link

Thunderbird 64-bit - version 60.7.0 is released
2019-05-18   link

Firefox 64-bit - version 67.0 RC2 (Release Candidate 2) is released
2019-05-17  link

Firefox 64-bit - version 67.0 RC1 (Release Candidate 1) is released
2019-05-14  link

Firefox 64-bit - version 67.0b19 (Beta 19) is released
2019-05-10  link

Firefox 64-bit - version 66.0.5 is released
2019-05-07   link