Page action button (in address bar) does not display if tab is in no container at all

[nike4613]

• Temporary Containers Version: 1.9.2
• Firefox Version: 115.13.0 (Floorp 11.15.0)

Actual behavior

No page action button when tab does not have container

Expected behavior

The page action button to be present even when a tab is not in a container

Steps to reproduce

1. Open a tab outside any containers (you can use the Sideberry extension, for instance, to do so)
2. Observe lack of button, even with option enabled

Notes

It seems to be this code that causes the problem:

temporary-containers/src/background/pageaction.ts

Lines 43 to 45 in cbb39f7

 const container = await browser.contextualIdentities.get( 
   activatedTab.cookieStoreId 
 ); 

I see in the debug console for the background page this error: