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Since WebExtensions is a seperate process from Firefox, how can we relaunch WebExtensions process alone?

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https://www.phoronix.com/scan.php?page=news_item&px=Firefox-63-Beta-Released https://www.mozilla.org/en-US/firefox/63.0beta/releasenotes/

I would like to relaunch WebExtensions process to see, if WebExtensions process is responsible for reloading-re-reading the extensions from the firefox extensions folder. (/lib/firefox/browser/extensions)

What is the correct way to do that?
https://www.phoronix.com/scan.php?page=news_item&px=Firefox-63-Beta-Released https://www.mozilla.org/en-US/firefox/63.0beta/releasenotes/ I would like to relaunch WebExtensions process to see, if WebExtensions process is responsible for reloading-re-reading the extensions from the firefox extensions folder. (/lib/firefox/browser/extensions) What is the correct way to do that?
Attached screenshots

Modified by boqsc

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I may be wrong, but I don't believe that's possible. I'm pretty sure that the process controlling WebExtensions is connected to the main Firefox process, so that needs to be open.