This version fixes many bugs, improves standards compliance, and implements many new web APIs compared to Firefox 2.0.

[8] This, like other Firefox codenames, is the name of an actual place; in this case the seventh-highest mountain in the Graian Alps where they first came up with the idea.

Planning began in October 2006, when the development team asked users to submit feature requests that they wished to be included in Firefox 3.

The new version fixes many bugs, improves standard compliance, and implements new web APIs.

Microformats are supported for use by software that can understand their use in documents to store data in a machine-readable form.

It is also used to implement an improved frecency-based algorithm for the new location bar auto-complete feature (dubbed the "Awesomebar").

Breakpad (previously called "Airbag") is an open-source crash reporter utility which replaced the proprietary Talkback.

[citation needed] During development, Breakpad was first included May 27, 2007 in Firefox 3 trunk builds on Windows NT, Mac OS X, and, weeks later, on Linux.

[39] With the announced date, the download day was June 18 for time zones greater than GMT +6, which includes half of Asia and all of Oceania.

The site was not updated for the download of Firefox 3 until 12:00 PDT (19:00 UTC), two hours later than originally scheduled.

[43] On July 2 Mozilla announced they had won the record, with 8,002,530 unique downloads[44] and parties in over 25 countries.

[44][46] Gareth Deaves, Records Manager for Guinness World Records, complimented Mozilla, saying, "Mobilizing over 8 million internet users within 24 hours is an extremely impressive accomplishment and we would like to congratulate the Mozilla community for their hard work and dedication.

[48] While the new functionality of the location bar, dubbed the "Awesomebar", was overall well-received,[49] there were those who did not like it due to user interface and performance changes,[50][51][52] so much that extensions were made to revert it.