Probably not, you can check here. Firefox may block it and warn you, provided that you have the options for dangerous and deceptive content checked, but common sense is your best defense.

Links asking you to update (by email or popups in some weird format) should never be trusted in the first place. Also, the long range of numbers in the link (or a hostname) indicates it is suspicious.

Hi   !

Tonnes is right, for this is a fake.

(Good for you to be on the alert, though)

Firefox will always update from within the browser and not from a random webpage. Scammers have been using this tactic, trying to get users to download and infect their computer. Hard to get rid off, as they will change their URL on a daily basis. You could consider an ad-blocking add-on like :

https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/?src=ss

Also see : https://support.mozilla.org/en-US/kb/i-found-fake-firefox-update