This Week in DevTools (December 3, 2019)
Patrick Brosset
Debugger
JavaScript engine work to support showing async/await calls in debugger stacks is making good progress. You can follow the work in the blockers of bug 1523865.
Console
Empty strings values in console.* calls are rendered as <empty string> — Bug 1375752
This revealed an issue in the console API implementation when logging multiple variables and the first one is an empty string. This was promptly fixed by baku — Bug 1599386
Mocha tests can be run on Windows — https://bugzilla.mozilla.org/show_bug.cgi?id=1600230
Layout/Mobile Tools
:wartmanm added support for sourcemaps/prettified when opening a Custom Element definition from the inspector (https://bugzilla.mozilla.org/show_bug.cgi?id=1478665 )
:emilio removed getBindingParent from the code base and the isShadowAnonymous flag. You can now do much more with nodes located under a shadow-root:
Firefox 71 Firefox 72
https://bugzilla.mozilla.org/show_bug.cgi?id=1598944 and https://bugzilla.mozilla.org/show_bug.cgi?id=1600084The work to correctly handle <meta viewport> metatags in RDM is complete (congrats Brad Werth) and the pref for it is now ON by default in Firefox 72 (https://bugzilla.mozilla.org/show_bug.cgi?id=1521934).
The new compatibility side panel in the Inspector now shows the icon for unsupported browsers (https://bugzilla.mozilla.org/show_bug.cgi?id=1590982).
Network Monitor
The WebSocket messages sidebar now shows downloaded and uploaded transfer sizes (https://bugzilla.mozilla.org/show_bug.cgi?id=1593831).
Remote Debugging
The Firefox logos have been updated in about:debugging to use the new design. https://bugzilla.mozilla.org/show_bug.cgi?id=1573101