1369284 - webRequest API produces a non-zero frameId for main frames

Status: RESOLVED DUPLICATE of bug 1367138

(WebExtensions :: Request Handling, defect)

Description

[Wladimir Palant]

Attachment: Minimal extension for testing

Steps to reproduce:

* Install the attached extension (either as a temporary add-on via about:debugging or by disabling signing requirements).
* Go to https://adblockplus.org/
* Press Ctrl+Shift+J to open Browser Console and look at the log entries prefixed with "**** beforerequest" - these contain the request ID, frame ID and URL for all requests reported via browser.webRequest.onBeforeRequest.

I tested this in Firefox 55.0a1 (2017-05-31 nightly) on Ubuntu.

Expected results:

Requests associated with the main frame have a zero frame ID. Only the requests made by the YouTube frame have a non-zero frame ID. This behavior is documented under https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/webRequest/onBeforeRequest#details

Actual results:

Only the document itself has frame ID 0. All requests made by the document (such as https://adblockplus.org/css/main.css) have a non-zero frame ID, and the requests associated with the YouTube frame merely have a different non-zero frame ID. This behavior is breaking Adblock Plus (the Web Extensions build) because requests cannot be attributed to a document properly.