Mozilla released an update to Firefox on December 1, 2014 with Firefox 34.0 and 34.0.5 (new install). US users who have not made changes to the search engine settings in Firefox can switch to Yahoo (with the new improved search bar) as the default search engine upon first run.
Also for US users Wikipedia searches are now using the HTTPS protocol for improved security. Default search engine changed to Yandex for Belarusian, Kazakh, and Russian locales. There are several other new features and fixes for this release and these can be viewed in the release notes.
Users may be prompted to update to the newest release (34.0) 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 newest Firefox update (34.0.5 via the getfirefox.com site. The next scheduled update for Firefox is January 6th, 2015 with Firefox 35.
