A confirmation page is wrongly displayed and "Facebook" and "Whatsapp" can be wrongly opened in another container if you previously assign them to FB container trough MAC

[Softvision-MariusComan]

[Notes]:

• This issue is not reproducible with the "https://www.instagram.com/" and with the "https://www.messenger.com/" websites.

[Affected versions]:

• Firefox 59.0.2 and above

[Affected Platforms]:

• All Windows
• All Mac
• All Linux

[Prerequisites]:

• Have a new Firefox profile with the "Facebook Container" add-on (1.4.0) installed.
• Have the "Firefox Multi-Account Containers" add-on (7.0.0) installed.

[Steps to reproduce]:

1. Open the browser with the profile from prerequisites and navigate to the "https://www.facebook.com/" website.
2. Click the "Multi-Account Containers" toolbar button and check the "Always open in Facebook" field.
3. Open any other container (e.g. Work) in a new tab and navigate to the "https://www.facebook.com/" website.
4. Observe the behavior. Extra:
5. Click the "Open in "Name" Container" button and observe the behavior.

[Expected result]:

• Step 4 & 5: The page is opened in the "Facebook Container".

[Actual result]:

• Step 4: A container confirmation page is wrongly displayed instead of opening FB page in the "Facebook Container".
• Step 5: The "Facebook" website is opened in the container selected at step 5.

[Additional Notes]:

• This issue is also reproducible if the website address is www or non-www, http or https, is accessed from the address bar or from the bookmarks.
• Attached a screen recording of the issue:

[jonathanKingston]

I can't repro this at all. The Checkbox shouldn't be clickable for Facebook in MAC ever.

[Softvision-CristinaBadescu]

This issue is still reproducible with last version of Facebook Container 1.4.0, on latest Nightly build 61.0a1 (2018-04-16), on Windows 10 x64, Mac 10.13.3 and Arch Linux 4.12, using the following: https://www.facebook.com/ http://www.facebook.com www.facebook.com

However, this issue is not reproducible by entering just "facebook.com" or "https:facebook.com" domains.

Below is a screen recording with both situations:

[TanviHacks]

Looks like there is some issue with the "www" prefix. Do we need to add some www logic to MAC? @jonathanKingston

[groovecoder]

The bug here seems to be that Step 2 shouldn't be possible: when you have MAC + Facebook Container installed together, the checkbox to "Always open in Facebook" should be disabled.

[maxxcrawford]

Is this still reproducible on the latest version of the add-on (2.1.1) and Firefox (77.0.1)?