Mozilla released an emergency security update for Firefox 36 on March 20, 2015 with Firefox 36.0.3. This update has Security fixes for issues disclosed at HP Zero Day Initiative’s Pwn2Own contest. Depending on their update settings, users should be prompted shortly to update to Firefox 36.0.3 or can also force the update by going to the Firefox Help Menu and selecting About Firefox then follow the prompts. Alternatively, users my also go to getfirefox.com and download and install the latest version of Firefox there.
The next scheduled release for Firefox is March 31st with Firefox 37.