If you refresh the page after assigning it to a container, "Containers confirm navigation" page is wrongly opened in a new tab

[SoftVision-CosminMuntean]

[Affected versions]:

• Firefox 54.0.1 and up
• Containers 2.3.0

[Affected Platforms]:

• All Windows
• All Mac
• All Linux

[Prerequisites]:

• Have the latest Containers (2.3.0) version installed on a new Firefox profile.

[Steps to reproduce]:

1. Open the browser with the profile from prerequisites and navigate to a website in a container tab (eg: Persoanl).
2. Click the Containers icon from browser toolbar.
3. Choose the "Always open in this container" option.
4. Refresh the page and observe the behavior.

[Expected result]:

• The page is correctly refreshed.

[Actual result]:

• The page is refreshed and a "Containers confirm navigation" page is opened in a new tab.

[Notes]:

• This issue is not reproducible if the "Always open in this container" option is set from context menu.
• This is reproducible at every refresh, until the tab is closed.
• Here is a screen recording with the issue:
  

[jonathanKingston]

Let me check if this is still an issue after the latest fixes.

[SoftVision-CosminMuntean]

I have retested this issue using the latest Firefox (54.0.1) release with Containers Experiment v2.4.0 and is no longer reproducible. Marking as verified.