Pretty much every previous major Release is EOL with no more updates.

Once Fx 117.0 is released the older Fx 116 will be EOL with no more updates.

The only previous version still supported with security/stability updates is Firefox 115 ESR. The older Fx 102 ESR branch will be EOL soon as the Fx 102.15.0 (released at same time as Fx 117.0 and Fx 115.2.0 ESR) will be the last major update for it, though they may still be minor updates for security fixes if warranted.

Normally the ESR versions are meant more for Enterprise users in mind. However since Fx 116.0 and later requires Windows 10 or later and macOS 10.15 or later to run, the Windows 7, 8, 8.1 and macOS 10.12, 10.13, 10.14 OS users will be served the Fx 115 ESR so they can get security updates support until 115.15.0 ESR in Sept 2024.

Thank you very much for the response!

Thank you very much for the response!

Pretty much every previous major Release is EOL with no more updates. Once Fx 117.0 is released the older Fx 116 will be EOL with no more updates. The only previous version still supported with security/stability updates is Firefox 115 ESR. The older Fx 102 ESR branch will be EOL soon as the Fx 102.15.0 (released at same time as Fx 117.0 and Fx 115.2.0 ESR) will be the last major update for it, though they may still be minor updates for security fixes if warranted. Normally the ESR versions are meant more for Enterprise users in mind. However since Fx 116.0 and later requires Windows 10 or later and macOS 10.15 or later to run, the Windows 7, 8, 8.1 and macOS 10.12, 10.13, 10.14 OS users will be served the Fx 115 ESR so they can get security updates support until 115.15.0 ESR in Sept 2024.

Pretty much every previous major Release is EOL with no more updates. Once Fx 117.0 is released the older Fx 116 will be EOL with no more updates. The only previous version still supported with security/stability updates is Firefox 115 ESR. The older Fx 102 ESR branch will be EOL soon as the Fx 102.15.0 (released at same time as Fx 117.0 and Fx 115.2.0 ESR) will be the last major update for it, though they may still be minor updates for security fixes if warranted. Normally the ESR versions are meant more for Enterprise users in mind. However since Fx 116.0 and later requires Windows 10 or later and macOS 10.15 or later to run, the Windows 7, 8, 8.1 and macOS 10.12, 10.13, 10.14 OS users will be served the Fx 115 ESR so they can get security updates support until 115.15.0 ESR in Sept 2024.

Hi thanks again for your response! May I know where I can get those information as you provided to me? As I cannot actually get the answers I need from the links. Appreciate to get your responses soon, thank you very much!

This site shows the currently supported versions of Firefox:

https://whattrainisitnow.com/

There is also Firefox Developer Edition which shortly before the Beta version.

Firefox Developer Edition is the same version as Beta channel, just with additional developer features.