1Password, one of my favorite —and certainly most frequently used— Safari extensions, got a major interface overhaul in its latest Lion update, featuring a markedly improved version of the popover concept previously introduced in its Chrome counterpart.

The redesigned interface is a significant departure from its former self, a glorified drop-down menu that has never belonged to the toolbar. Thanks to a healthy amount of animated transitions and a successful combination of popovers and icon-centric sidebar navigation —two of the hottest interface design patterns as of this writing—, the new extension feels right at home in Safari 5.1 and Lion.

If you consider for a second the fact that a Safari extension with a dedicated multi-view interface and full-fledged navigation was all but conceivable in the pre-iOS era, you would quickly realize that the influence of iOS on its desktop sibling transcends gimmicky launchers and borderline confusing multi-touch gestures.