1520992 - webRequest.onBeforeSendHeaders in blocking mode stops firefox PWA from loading target page on android

Status: RESOLVED DUPLICATE of bug 1496684

(Firefox for Android Graveyard :: General, defect)

Description

[Matt]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36

Steps to reproduce:

Perform following steps in Android FireFox 64.0.1.

1. Install an browser extension that uses webRequest.onBeforeSendHeaders with blocking e.g.
   browser.webRequest.onBeforeSendHeaders.addListener(
   function(details)
   {
   details.requestHeaders.push({'name': 'MyHeaderName', 'value': 'myHeaderValue'});
   return {requestHeaders: details.requestHeaders};
   },
   {urls: ["<all_urls>"]},
   ['blocking','requestHeaders']);
2. Add a Progressive Web App (PWA) to home page (Must be one that is intercepted by the url filters and extension manifest permissions).
3. Close both PWA and firefox. *This bug does not occur if firefox is running in the background!
   4.Open PWA.
4. Target page will not load.

I've confirmed this does not affect 63.0.2 and began with 64.0.1 and still affects 64.0.2. It only occurs when the 'blocking' parameter is used. And does not occur if firefox is running in the background.

Actual results:

PWA will open on a blank white screen and not progress further. e.g. will not display target page.

Expected results:

PWA will open, Header is added to request and PWA will load target page.

Comment 2

[[e-mail]]

2. Add a Progressive Web App (PWA) to home page (Must be one that is intercepted by the url filters and extension manifest permissions).

Not sure what that is... What would be a PWA to add specifically in order to reproduce the issue?

Comment 3

[Jan Henning [:JanH]]

A custom tab would work equally. If you've got a computer and ADB handy, you can launch one by running adb shell am start --esn android.support.customtabs.extra.SESSION -a android.intent.action.VIEW -d http://www.example.com.

Alternatively, someone else might know some good examples for apps that are using custom tabs.