The latest 1Password update from the guys at Agile Web Solutions adds improved support for Firefox 3 and newly added support for the Safari 4 Developer Preview for the popular password manager for Mac. Also, 1Password 2.6.5 adds support for DEVONagent 2.3.1, OmniWeb Sneaky Peeks and Flock 2.

The update is free to all registered users who have recently updated to the latest version we covered, 1Password 2.6.2, which packed a whopping 100 changes. The upgrade, dating May 22nd, offered users the chance to get a 20% discount on TextExpander, a Mac OS X utility from developer SmileOnMyMac.

Aside from the above-mentioned new additions, 1Password 2.6.5 also brings Autosave to Safari, a Strong Password Generator window and the ability to generate non-web passwords, among other improvements. Agile Web Solutions has improved credit card fill on skype.com and esellerate.com, to mention just two more changes, but also fixed a problem in digest password generator.

Agile Web Solutions' popular password manager for Mac remembers all your online passwords that you can insert on any web page or form, anytime, by using one single password. 1Password integrates directly into most browsers and sports built-in anti-phishing and keylogger protection, while users can easily manage hundreds of passwords with one master key. The developers have also introduced the useful service to iPhones as well, but only through a limited web version that lets you take your information with you.

An iPhone version of 1Password (app) is due out soon.