I checked with Synaptic Package Manager and the latest is 36.0.1+.....
37 was released in March.
If you run in a terminal
sudo apt-get update && sudo apt-get dist-upgrade
this may install the newest version 37 of FireFox if the upgrade was hold back/could not have been installed because it has different dependencies in comparison to version 36.
apt-get distupgrade
includes upgrade
, but is also capable of intelligently handling changing dependencies (another lib has to be installed or one gets removed for example). The normal upgrade
just holds the update back in this case.
You can see from the full publishing history for Firefox in Ubuntu that v37 has been available in every supported version of Ubuntu in the hours following 2015-04-07 09:31:51 UTC.
In supported versions of Ubuntu (Precise, Trusty and Utopic) it's sitting in both the updates and security repos. In Vivid (which is still just about in development, it's just in the main repo.
You either...
sudo apt-get update
or click Update in your package manager) It is available for Ubuntu 14.10:
https://launchpad.net/ubuntu/+source/firefox/37.0.1+build1-0ubuntu0.14.10.1
Do you have the security or updates sources enabled in the "Software & Updates" preference app (look in Updates tab)?
Click the reload button in the upper left hand corner to update your listing in Synaptic Package Manager:
If all else fails, try changing your server in software sources: Open Software & Updates, choose Download From as shown:
And choose Other and then choose a server near you shown as close to being being up to date as possible in this listing
sudo apt-get update && sudo apt-get upgrade
)