[Notes]: - If you have Top Sites on two rows the placeholders force the sections to jump around because it only shows a single row of Top Sites. There should be two rows of placeholders if the user has Top Sites on two rows. [Affected versions]: - Firefox 58.0a1 Build ID 20171018220049 [Affected Platforms]: - All Windows - All Mac - All Linux [Steps to reproduce]: 1. Open the browser and open a new window. 2. Disable the Search bar from the customization panel. 3. Open a new window and observe the behavior. 4. Open a new tab and observe the behavior. [Expected results]: - Step 3 & 4: The placeholders are displayed before the content is loaded. [Actual results]: - Step 3 & 4: The page is empty and then content appears. [Additional notes]: - The issue became more apparent after bug 1383593 was fixed. - The issue is also reproducible if the Top Sites or Highlights sections are disabled, or if any combination of two sections (eg. Search + Highlights) are disabled. - Attached a screen recording of the issue.

I was under the impression that this scenario represents a good way to see the effects of https://github.com/mozilla/activity-stream/issues/3367. I'd rather we keep the issue open so that it can be more easily verified.

Bug 1421436 has been backlogged, so unclear if this should be in 62