Hi Hector,

Thank you for reviewing.

> This would be a so much better extension if there's an option to force mobile version of webpages in sidebar (which is usually designed to reflow for narrower interface, which is perfect for a sidebar)
It completely depends on the site. For instance, a page of twitter (e.g. https://twitter.com/githubstatus) in the sidebar displays a mobile UI but Wikipedia does not. Sites like the latter, you may need to change your user-agent.

> allow users to customize their own search engine
Sometimes I think that I should add this feature. This will be added, perhaps.

> or simply allow bookmark search feature, which is one of the geniuses of firefox
I have never thought about it. This will be added also, if possible.

I am so happy because I have gotten some ideas. If you have additional questions or feedback, please tell me.