It does its job and does it well. Be sure to have EdgeDeflector installed so that Windows 10 searches route to Firefox. Used to use Chrometana on Chrome, this works just as well for Firefox.
EDIT: EdgeDeflector was killed a couple years ago. MSEdgeReflect replaces it with the same functionality, but also has options to redirect searches, making this extension obsolete if you're using it specifically to redirect Windows web searches.

perfect, followed the instructions, work like a charm

Works perfectly for redirecting searches from Visual Studio

Fantastic No more annoying cortana and bing

Works great with Cortana, but COMPLETELY removes access to Bing.

Works completely as intended, redirects all cortana searches to my desired search engine. This add-on is statying on.

Blocks common websites such as bing.com/Translator. Does not work: Windows 10 Search still uses Edge and Bing search, not Firefox and Google as advertised. Firefox is Default Browser. Edge Deflector is installed. A TOTAL DISASTER!

all works fine / tout fonctionne bien - j'ai configuré la redirection vers qwant.com