Amazing! It should serve as standard of a properly written add-on for other developers. Small feature suggestion: add an option for appending selection to clipboard. This could be a real click-saver and a replacement for addons like "AddMoreTextToClipboard" or "Text MultiCopy". It could have the following options:
1. Append to clipboard (no separator)
2. Append to clipboard (add line break)
3. Append to clipboard (add double line break)
4. Clear clipboard.

I have tested several similar addon, and this has everything I needed. Great addon.

Excellent extension, just two very, very minor suggestions. 1) Could you add a maximum character limit option to the auto-popup. You already have a minimum limit, and personally, I'd rather not have the thing pop up when I'm copying a whole paragraph. 2) I couldn't find this extension when looking for "context search" in the addon library, so maybe improve your SEO in the

Best one I've found.

Just Sooooo Goooddd...

must have add-on

I am loving this extension! Just wondering if you could add a user page or something where users can submit more examples (If something like this already exists, please let me know!)? A couple of things I'm looking for but haven't figured out just yet are how to have the selected text's hyperlinked url open as cached link [basically launch url as a google webcache search] or similarly open link as viewsource. Hope that somehow makes sense.
Here's some dumb ones I use regularly, lol, if anyone cares. :D

Audible:
https://www.audible.com/search?keywords={searchTerms}
Goodreads:
https://www.goodreads.com/search?utf8=%E2%9C%93&query={searchTerms}
Google Dictionary:
https://www.google.com/search?hl=en&q=define%20{searchTerms}
Google Playstore:
https://play.google.com/store/search?q={searchTerms}&c=apps
Google Site:
https://www.google.com/search?q={searchTerms}%20site:{hostname}
Google Images:
https://www.google.com/search?tbm=isch&q={searchTerms}&tbs=imgo:1
DuckDuckGo:
https://duckduckgo.com/?q={searchTerms}&kae=d&kl=us-en&kad=en_US&kp=-2&kz=-1&kn=1&k1=-1&kaj=u&kam=google-maps&kv=l&kak=-1&kax=-1&kaq=-1&kap=-1&kao=-1&kac=-1&ks=l&kw=w&km=m&k5=1&kt=c
DuckDuckGo Images:
https://duckduckgo.com/?q={searchTerms}&kp=-2&kaj=u&kam=google-maps&kau=-1&kao=-1&kaq=-1&kap=-1&kax=-1&ks=l&kw=w&kae=d&k5=-1&kav=1&t=h_&iax=images&ia=images

In any event, the app is awesome. Highly recommend!

非常好用，自定義常用搜尋引擎後，省掉不少時間

Hope author build-in the (https://www.google.com/search?q={searchTerms} site:{hostname})
It's cool, but many people dont's know this. we don't need install addition addon like "Search Site WE"any more.
此扩展可以搜索当前网站,添加 https://www.google.com/search?q={searchTerms} site:{hostname}
这样就不用安装 Search Site WE这样的扩展的.

удобная вещь