It's perfect. It does exactly what I need it to do. It lets me access the search engines I selected in the Firefox settings by right-clicking on selected test. There's no irritating setup required, and the selected text is forwarded to one of the engines you're already using.

I've just installed this as a replacement for "ContextSearch web-ext", which has fallen victim to a bad case of feeping creaturism™. Compared to that Context Web Search is minimalism at its best (apart from wrapping each search engine name in "Search [foo] for [bar]", which I find quite unnecessary).

I hope this extension will keep its context menu up-to-date and tidy over time as I add/remove/re-order my search plugins. We'll see. For the time being: kudos to the author for doing one thing and doing it well!