background.js threading architecture

[Jordan McDonald]

Hey All,

Is the background.js architecture a single thread?   For example if i have injected some code into the page via content scripts will have two + tabs open will there be thread contention with the background thread?   

It seems that when I refreshes two tabs about the same time only one of them seems to get all the elements populated.  I am wondering if I need to adjust my code or if by design the background process is single threaded.

Bigger questions is do I need the background.js or can i do everything with content scripts and my extension code?

Thanks

Jordan

[Jeffrey Yasskin]

All Javascript is single-threaded, but multiple callback chains can
interleave with each other. Different tabs effectively live in
different processes that are sometimes allowed to exchange messages,
and the background page is, similarly, a separate process from any
tab.

Javascript running in a content script can't do everything that
javascript running in a background page can:
http://developer.chrome.com/extensions/content_scripts.html.

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