UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.84 Safari/537.36

Steps to reproduce the problem:
1. Open chrome in two different profiles
2. Have Chrome Vox extension in both profiles, disabled
3. Navigating in both profiles should work as usual
4. Turn on Chrome Vox in one profile. As expected it's turned on and aria labels are being read out.
5. Now use the second profile. I would expect that Chrome Vox is not activated in this profile. However it still reads out all labels. 

What is the expected behavior?
I expect that Chrome Vox is only working in the profile where I activated it.

What went wrong?
Chrome Vox is activated in all open Chrome profiles, instead of in the one where I activated it.

Did this work before? N/A 

Chrome version: 68.0.3440.84  Channel: stable
OS Version: 
Flash Version: