IndexedDB errors in nightly

[k88hudson]

I am getting IndexedDB errors in Nightly 58.0a1 (2017-11-03) on every new tab. Unfortunately, the error information is not particularly helpful:

{
 DOMException
code: 0
columnNumber: 0
data: null
filename: ""
lineNumber: 0
message: "The operation failed for reasons unrelated to the database itself and not covered by any other error code."
name: "UnknownError"
result: 2154168321
stack: ""
}

Being thrown on the open request here:

activity-stream/system-addon/content-src/lib/snippets.js

Line 120 in caaa2fd

openRequest.onerror = event => {

[k88hudson]

Hm, I am seeing this in beta as well

[piatra]

Is this AS related? I'm seeing the same failure on other websites trying to use IndexedDB.

[dmose]

Note that indexedDB is enabled on about:home but not about:newtab. Could that be related ?

https://dxr.mozilla.org/mozilla-central/source/browser/components/about/AboutRedirector.cpp#81

[Mardak]

Moved to https://bugzilla.mozilla.org/show_bug.cgi?id=1421427