Handy but limited. Allowing wider view (50% instead of 25% of window) would help a lot. Too many web pages are not optimized for mobile view and are not readable when limited to 25% side bar (PDFs opened in browsers, for example). That's available with Tile Tabs WE, but it would be nice to have in Side View to not have to guess how a particular page is going to behave, choose which extension to use, test it, find it's not the right choice, close, choose the other one, etc.