Re: Add-on bar or navigation toolbar icon showing same status across windows

STF wrote:

> The value is supposed to be persistent (ie its value does not change 
> from a session to another).  So that means it's better to store it in 
> preference?

For a simple boolean value then that is probably the easiest way to 
persist it.

> And suppose I'm to use the "global preference observer" method you 
> suggested, could you give me a link to any doc or tutorial please?

There are a number of useful documents for traditional extensions. This 
one seems particularly suited for someone wanting to add preferences to 
an existing extension:
https://developer.mozilla.org/en/docs/Adding_preferences_to_an_extension

Unfortunately I couldn't find any documentation for JetPack extensions.

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