Heads up that once this lands in nightly, if you have
browser.newtabpage.activity-stream.asrouter.devtoolsEnabled set to
true you will see a button show up in the top left hand corner of the new tab page (see attached screenshot).
false. Open about:newtab. Ensure you do NOT see a yellow button in the top left hand corner.
- Set the above pref to
true. Ensure you now see a button that says "Expand Devtools".
- Click the button. The button should now say "Collapse Devtools". You should see the devtools appear on the page. Ensure they are working normally and you can scroll.
- Click the button again. Ensure you now see the regular new tab page and can scroll.
false again. Ensure you see a regular new tab now and that the yellow button disappears.
Please also check snippets are working normally in both settings of the devtools pref.