No open/save dialogs
Since today (might have been a little more, not sure), I'm unable to open any "save as" dialog, as well as "open".
For example, I right click on an image, "Save As", nothing happens.
On website where you can click a button to upload a file from the computer, nothing happens (for example if I go to Google Search By Images and try to upload an image).
I didn't install anything, except a new Windows 10 release (insider) yesterday, so that might have to do with it. I have no idea how to investigate or fix this issue.
I'm going to reply to myself to say this seems to be fixed on Vivaldi 1.9 RC.
Maybe re-installing 1.8 would have fixed it too never tried
So seems fixed more or less !