Multiple container tabs opened on clicking a link to another container

[grouvig]

When opening a link from one container tab to another container tab with middle click, two or more tabs are opened for the target container.

I reproduce it with a facebook container and a google container:
With only one tab open in Firefox I google facebook in this tab.
Then I middle click facebook.
This opens two tabs in facebook container.

In can reproduce it everytime I am in any container and then open a link with middle click to another container.

Doing the same with duckduckgo, instead of google, for which I have no container, only opens one facebook tab as expected.

Now with only one tab open in firefox, I open facebook in this tab.
In another tab I google facebook.
Then I middle click facebook.
Now only one facebook tab is opened as expected.

Conclusion:
Everytime I am in a container a middle click on a link opens two container tabs if there is not another tab already opened for the target container.

See also mozilla/multi-account-containers#1617

[grahamperrin]

For those of us without middle-clicks:

Use mouse shortcuts to perform common tasks in Firefox | Firefox Help

Open link in new Tab | Middle-click on Link

[grahamperrin]

#4 (comment)

… a facebook container and a google container:
With only one tab open in Firefox I google facebook in this tab.
Then I middle click facebook.
This opens two tabs in facebook container.

Not reproducible:

2021-05-07.00.10.24.mp4

@grouvig please tell what extensions you have enabled. You can use:

• Add-on List-o-matic 9000

For now: just the names of add-ons, sorted alphabetically. Thanks.

[grahamperrin]

… reproducible after also using container site lists:

• www.google.co.uk to always open in the Google container, and then remember the decision
• en-gb.facebook.com to always open in the Facebook container, and then remember the decision.

URLs for test purposes:

• https://www.google.co.uk/search?q=Facebook
• https://en-gb.facebook.com/

[grouvig]

@grahamperrin,

List of Extensions (Sat May 08 2021):
Add-on List-o-matic 9000 1.5
AddToAny: Share Anywhere 3.4.1
Amazon.co.uk 1.4
Bing 1.3
ClearURLs 1.21.0
Decentraleyes 2.0.15
Disconnect 20.3.1.1
DuckDuckGo 1.1
eBay 1.3
Facebook Container 2.2.1
Firefox Multi-Account Containers 7.3.0
Firefox Pioneer 1.0
Google 1.1
Google Container 1.5.4
HTTPS Everywhere 2021.4.15
Language Switch 2.7.0
Link Gopher 2.0.1
MySessions 2020.9.0
NoScript 11.2.7
Outgoing Links in Default Container 0.1
Privacy Badger 2021.2.2
Privacy Possum 2019.7.18
QueChoisir - Oqif 1.2.8
Session Boss 2.11.2
Session Sync 3.1.12
Signal Spam 2.7.2
Sort tabs advanced 0.2
Stylus 1.5.17
uBlock Origin 1.35.2
uMatrix 1.4.0
Undo Closed Tabs Button 0.1.9
VT4Browsers 3.1.0
Wikipedia (en) 1.1
Zoom Page WE 18.6