cannot login to blablacar.co.uk with facebook

[demoklion]

• Is "Firefox will: Never remember history" in the Firefox Preferences/Options under "Privacy & Security > History" selected? Yes/No: No
• Are you using Firefox in a Private Window? Yes/No: No
• Can you see a grayed out but ticked Checkbox with the description "Enable Container Tabs" in the Firefox Preferences/Options under "Tabs"? Yes/No: Yes
• Facebook Container Version: 1.3.0
• Operating System + Version: windows 10 pro v.1709 b.16299.309
• Firefox Version: 60.0b10 (64-bit)
• Other installed Add-ons + Version + Enabled/Disabled-Status: ADB Helper 0.12.0 true adbhelper@mozilla.org Auto Tab Discard 0.2.2 true {c2c003ee-bd69-42a2-b0e9-6f34222cb046} Bookmark Dupes 5.7 true bookmarkdupes@martin-vaeth.org Compat Report 0.1.0 true {13d75c08-fed6-4ff6-a356-d79509b17e44} Facebook Container 1.3.0 true @contain-facebook Firefox Multi-Account Containers 6.0.0 true @testpilot-containers FormApps Extension 2.4.1.26 true {69F080C9-A1D8-42F8-BD83-3D54D4BC81B3} Hide W3Schools 1.1.1 true @hide-w3schools Live Server Web Extension 1.0.0 true {cbdcd14f-ec92-4385-9119-549b5a5b5519} Pushbullet 335 true jid1-BYcQOfYfmBMd9A@jetpack Shodan 0.3.2 true jid1-AWt6ex5aPvWtTg@jetpack Snooze Tabs 1.1.0 true snoozetabs@mozilla.com Test Pilot 2.0.8-dev-259fe19 true @testpilot-addon uBlock Origin 1.15.24 true uBlock0@raymondhill.net Web Developer 2.0.1 true {c45c406e-ab73-11d8-be73-000a95be3b12} Web Scrobbler 2.4.3 true {799c0914-748b-41df-a25c-22d008f9e83f} WhatRuns 1.7.0 true {66d854c2-fd1b-4857-bd0a-7d220e4834da} Adobe Acrobat 18.0.8 false web2pdfextension.17@acrobat.adobe.com Tab Suspender (memory saver) 0.2.6 false {e225ac78-5e83-484b-a16b-b6ed0924212f}

Issue

Facebook login doesn't work on https://www.blablacar.co.uk/login

Actual behavior

Flashes some tiny window, then opens

https://www.facebook.com/v2.9/dialog/oauth?app_id=123152947759014&channel_url=https%3A%2F%2Fstaticxx.facebook.com%2Fconnect%2Fxd_arbiter%2Fr%2FFdM1l_dpErI.js%3Fversion%3D42%23cb%3Df1548417b2d412%26domain%3Dwww.blablacar.co.uk%26origin%3Dhttps%253A%252F%252Fwww.blablacar.co.uk%252Ff318e6f0e2bf92%26relation%3Dopener&client_id=123152947759014&display=popup&domain=www.blablacar.co.uk&e2e=%7B%7D&locale=en_US&origin=1&redirect_uri=https%3A%2F%2Fstaticxx.facebook.com%2Fconnect%2Fxd_arbiter%2Fr%2FFdM1l_dpErI.js%3Fversion%3D42%23cb%3Df23d41d9025826%26domain%3Dwww.blablacar.co.uk%26origin%3Dhttps%253A%252F%252Fwww.blablacar.co.uk%252Ff318e6f0e2bf92%26relation%3Dopener%26frame%3Df165f0615af9cc8&response_type=token%2Csigned_request&scope=email%2Cuser_birthday%2Cpublic_profile%2Cuser_friends&sdk=joey&version=v2.9

in the Facebook container in a new tab.

Expected behavior

Opens a window to fill-in Facebook login (or just flashes it for a second, since I'm already logged in to Facebook), then closes the window and redirects me to blablacar.co.uk's main page.

Steps to reproduce

1. Disable built-in Tracking Protection
2. click Continue with Facebook

Notes

..

[TanviHacks]

Login with facebook does not always work with this extension. If a third party uses login with facebook and acheives the login flow by using url parameters, this will work. If not, then it will not.

This is by design - because if you logged in with facebook in your regular Container, then facebook would have your identity outside the Facebook Container. The point of the extension is to make sure this doesn't happen. This is also noted here - https://support.mozilla.org/en-US/kb/facebook-container-prevent-facebook-tracking#w_how-does-this-affect-facebookaos-features

[ryanfeeley]

@TanviHacks We have to do more to support the use case of adding other sites into the Facebook container. Firefox cannot become the browser that you can't use for Pinterest, Airbnb and the thousands of other sites that offer sign in with Facebook. Add-ons do allow us to do what I've mocked up below, however websites load content from many domains. It will have to be smart about it.

[demoklion]

@TanviHacks seems this issue is better described in #27, you can remove or merge this one with it.

[maxxcrawford]

We have this issue on going in #422. Closing this and adding the domain there to be included in testing. Thanks!