Facebook opens in two tabs when trying to open from another container that has Limit to Designated Sites set

[mdpenguin]

• Facebook Container Version: 8.1.2
• Operating System + Version: Windows10 (Version 10.0.19043 Build 19043)
• Firefox Version: 117.0.1
• Other installed Add-ons + Version + Enabled/Disabled-Status:
  • Dark Reader
  • Ecosia
  • Firefox Multi-Account Containers
  • Tab Session Manager
  • Tranquility Reader
  • uBlock Origin
  • Undo Close Tab

Actual behavior

When opening Facebook from within another container that has "Limit to Designated Sites" set then it opens in two tabs.

Expected behavior

Facebook should only open in one tab

Steps to reproduce

1. Open another website in a container
2. Type the URL for Facebook in the URL bar
3. Note that it opens in two tabs

Notes

I've tried this with "Replace tab instead of creating a new one" both checked and unchecked and it doesn't seem to make a difference

[mdpenguin]

I've also confirmed that it does not happen the other way around: if I open a URL that is set to open in another container in the FB container then it has no problems.

[mdpenguin]

What appears to be happening is that FF Containers is closing the original container and starting to open FB before Facebook Containers tries to do the same in a new tab. The original tab at this point has the same domain as the target domain so it is not closed.

[dannycolin]

That'd make sense. Multi-Account Containers and Facebook Container can interfere with each others depending how you configured things. Not sure what'd be the solution to solve your specific problem but make sure you didn't assigned any Facebook/Instagram/Meta URL to another container in Multi-Account Containers.

[mdpenguin]

I'm pretty sure that I found a solution that won't break anything: it'll close the newly created tab if it is inactive and also a duplicate of one that already exists.