Rated 2 out of 5 stars

Not working in Firefox Developer Edition 41.0a2 (2015-07-03).

This review is for a previous version of the add-on (0.4.5.2). 

This is because Nightly purposely disabled plugin loading in the main process. See https://github.com/yxl/Fire-IE/issues/128#issuecomment-100589782 for details.

For now, the only workaround is disabling e10s (multi-process firefox) feature in Nightly settings.