Switch tab search action is missing an icon
The "Switch to tab" search action is missing an icon:
This is because it uses a firefoxview (Firefox sync) tab icon, which is excluded from our build because we don't have firefoxview.
We could ask upstream to move the icon out of firefoxview, since it is seemingly more generic. And then we hot-fix to include the icon in the mean time.
Or we could drop the icon or use an alternative.