PID of tab as a pattern for FireTitle and/or Crappy Firetitle about firetitle HOT 6 OPEN

@grahamperrin I browsed through the webextension API and found no such thing as a function returning the PID of a tab. This is to be expected, for two reasons. First, the pid is an os-dependant notion, some os could have uuid instead of pid, others might not allow for mpc and so force the use of threads, etc. But an api for extensions has to be the same for all platforms. Secondly, revealing the pid to a webextension might be a security risk, since it would mean potentially revealing the pid to the entire web.

I searched for such functions in the xul api too, but couldn't manage to find anything else that the snippet present in the bug repport you mentioned.

So, sorry, I'd gladly implement this feature, but I can't do it unless there is a way to get the pid through the API.

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Except it doesn't work.

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Thanks for the quick response. WebExtensions APIs aside, for a moment …

… I found https://github.com/mystor/content-pid for a legacy extension. No screenshot at https://addons.mozilla.org/addon/content-pid/, I'll add the extension to a test profile to tell how it presents itself …

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I see. This addon use the bootstrap api, and it looks like it was indeed possible...

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I spoke too soon. Apparently, there is a way to retrieve the process id from a frame: https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/webNavigation/getFrame

Rather here: https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/webNavigation/onDOMContentLoaded

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Apparently, this is being deprecated and removed from the api. See for example the chrome api: https://developer.chrome.com/extensions/webNavigation#method-getFrame

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