Mozilla has let loose the latest update for the popular Firefox web browser.

Firefox 12 offers a number of bug fixes and features, notably the suppression of the user account control dialog (UAC) pop-up.

Alongside the UAC change, the new version includes many security fixes and packs a number of developer tool improvements. Web Console, Scratchpad, Style Editor, Page Inspector, 3D Page Inspector and more.

Here’s an overview of the new in Firefox 12 below:

• New – Windows: Firefox is now easier to update with one less prompt (User Account Control)
• New – Page Source now has line numbers
• Changed – Line breaks are now supported in the title attribute
• Changed – Improvements to “Find in Page” to center search result
• Changed – URLs pasted into the download manager window are now automatically downloaded
• Developer – Support for the text-align-last CSS property has been added
• Developer – Experimental support for ECMAScript 6 Map and Set objects has been implemented
• Fixed – Various security fixes
• Fixed – Some TinyMCE-based editors failed to load (739141)
• Fixed – OS X: WebGL performance may be degraded on some hardware (713305)