Other improvements in Firefox 18 include a browser-integrated PDF viewer, as well as the option to disable insecure content when visiting secure web sites. The latter was apparently just short of 12 years in the making, according to Johnathan Nightingale, Mozilla's vice president of engineering. The initial code for it was first added just four years before the appearance of Firefox 1.0.
For now, the final version of Firefox 18 is expected to ship on Jan 7, 2013 and the beta version can be downloaded here.
- check out this article at The Inquirer