Added a multi-search feature. That allows you to select multiple websites and search them all at the same time. Ability to select which engines appear in context window. Some cosmetic features.

Improved start-up clearing cache, right context-menu persistence. Selecting from drop-down menu in pop-up menu will automatically launch search.

Added hotkey Ctrl+Shift+F pop-up functionality. Use hot keys to open search pop-up, or select text to add to search pop-up.

Removed need to access Add On settings to enable it to work. Minor visual corrections.