Mozilla has released the latest update of Firefox on Tuesday, October 14th with Firefox 33. This update contains numerous changes and fixes, which can be viewed in the Release Notes.
Users may be prompted to update to the newest release of Firefox or can do so manually within Firefox by going to Help > About Firefox and following the update prompts. Users may also manually download and install the Firefox update via the getfirefox.com site.
The next scheduled update for Firefox is November 25th with Firefox 34.