[Affected versions]:
Nightly 79.0a1 (2020-06-23)

[Affected platforms]:
Platforms Mac 10.14

[Preconditions]
Have devtools.responsive.browserUI.enabled = true

Steps :

1- Launch the Firefox browser and reach about:debugging
2- Hit Ctrl+Shift+M in order to start Responsive Design Mode with touch simulation on (make sure to check reload when touch simulation is toggled option)
3- click any link (troubleshoot, or "this nightly" in setup , or "manifest url" in this nightly)
4- Nothing happens
5- deactivate touch simulation
6- click links mentioned in step 3
7- links are opened successfully.

Expected Results :
The user should be able to access links with RDM, having touch simulation enabled or disabled.

Actual Results :
Links only work with touch simulation off

Hi, i'm also able to reproduce this issue in beta 79.0b5 (64-bit). A double click is required to make links work. See bug https://bugzilla.mozilla.org/show_bug.cgi?id=1648112

Best regards,
Clara

Hi Micah,
When hovering over each section's link, the text that appears at bottom left corner of the browser's window won't correspond to the section, is it related to this issue? Video attached was tested on beta 79.0b7 (64-bit), macOs 10.14
Best, Clara

Hi Clara, it looks like this might be related to the existing issue. It seems like the touch points for the links are a little bit offset. Thanks for the update!