Problems with IBL and inverted rough/glossness

I have just noted that all my models have problems with image base lighting and roughness.
My settings seem to have changed.

-For some models, the roughness map has no effect anymore. The roughness/glossiness switch seems to be inverted.
-The Image Base Lighting has no effect anymore too, no matter the environment option is enabled or not.

PBR option is checked, as I left it last time I uploaded my models.
I may have missed an update since I haven’t checked my models for a while…

It seems the problem comes from my version of firefox (46.0 on PC). It actually works fine with chrome, as well as on a previous firefox version (linux version).

Yes, the issue is known.
I reported the bug and hopefully they will backport the fix on FF46.

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