[Affected versions]: - latest 50.0a1 Nightly - latest 49.0a2 Aurora - Firefox 48.0b7 - Firefox 47.0.1 [Affected platforms]: - Windows 10 x86/x64 [Steps to reproduce]: pre-requisite: make sure Cortana is enabled 1. Open Firefox and make it the default browser. 2. Perform a search with Cortana. [Expected result]: - The search results are displayed with Firefox and it's search engine. [Actual result]: - The search is performed with Edge with bing. [Regression range]: - This is not a Firefox regression, but it used to work on older Windows 10 builds. [Additional notes]: - I'm unable to determine the exact time when this stopped working since it will require a lot of time invested into installing several insider builds. - Tested with Insider build 14388.

Is there something we can/should do about this?

Further investigation proved that this bug is reproducible: - with Insider Preview Build 14390 (latest as of today) - on release builds of Windows 10 as well (e.g. 10586.494) - with other browsers as well (e.g. Opera, Chrome) From QE's perspective, this is an OS related shortcoming.

Didn't Microsoft change this intentionally? http://www.pcworld.com/article/3063119/windows/microsoft-locks-down-cortana-blocks-integration-with-other-browsers-search-engines.html

Directly from MS: https://blogs.windows.com/windowsexperience/2016/04/28/delivering-personalized-search-experiences-in-windows-10-through-cortana/ > Starting today, to ensure we can deliver the integrated search experience designed for Windows 10, > Microsoft Edge will be the only browser that will launch when you search from the Cortana box.

Yeah this is wonfix because Microsoft won't allow us to change this anymore. :sadface:

Does this mean there's code that's now dead and that we can remove?

(In reply to Florian Quèze [:florian] [:flo] from comment #6) > Does this mean there's code that's now dead and that we can remove? Yes, filed bug 1287622 to remove it. Thanks for saying something :)