Affected versions

• 80.0a1 (2020-07-16)

Affected platforms

• Windows 10x64

Steps to reproduce

1. Launch FF.
2. Go to https://bugzilla.mozilla.org/show_bug.cgi?id=1653501
3. Click on attachment to open it.
4. Click outside the attachment to close it.

Expected result

• The image attachment is closed instantly after 1 click.

Actual result

• The image attachment is not closed instantly. It requires 2 clicks to close two parts of the picture.

Regression range

• First bad:2020-07-15
• Last good:2020-07-14
• Pushlog:https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=bfe1e7725ac66482971c932ec5ffae0038aaad6e&tochange=a5f03b0f9618daad44d647aeab238962e9921304
• Potential regressor: 1650984

Additional notes

• I would consider this an S3, since it is only on Windows 10 and it does not completely block the user from seeing or closing attachments.

Vlad, are you using WebRender?

Hello,

At the time , I did not have fission.autostart and gfx.webrender.all activated.
However, it is important to note that I can no longer reproduce this issue on the same OS , with or without the above mentioned preffs activated with the latest Nightly 80.0a1 (2020-07-19).

Hm, strange. We can close this bug for now then and if it happens again, re-open.