Here we can surface background fetch related failures and statuses which can't be accessed from other internals pages and will be useful for the developer to debug what's going on.

For instance, once we start capping fetches to downloadTotal and integrate with Quota, it'll be helpful for the developer to see that error on this page, given that downloads-internals will only give them info on succeeded downloads, but not on the downloads that were never started.

Similarly, information like which icon was picked from their list would help them reason about which icons to choose for their final product, given that we do some resizing of icons per device.