UserAgent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0

Steps to reproduce the problem:
1. Get a swf file
2. Define google chrome a default openner
3. Double click on file

What is the expected behavior?
The flash should be open in a new tab of google chrome.

What went wrong?
Got the error message : Class not registered, on every flash I have.

Did this work before? Yes Before the v 49.0.2623.87 of google chrome

Chrome version: 49.0.2623.87  Channel: stable
OS Version: 8
Flash Version: Shockwave Flash 21.0 r0

I use flash to work then it's a bit disturbing. 

Note : You can launch the flash by darg&drop it on google chrome. But the manipulation isn't the best efficient one.