Disable 8.3 name support. Disable last access time. Exclude directories for Windows Defender.
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Developing add-ons in Firefox
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Debugging add-ons in Firefox
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https://developer.mozilla.org/en-US/docs/Tools/about:debugging
Firefox add-on documentation
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https://developer.mozilla.org/en-US/Add-ons
Home page.
WebExtensions API for developing Firefox add-on
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https://wiki.mozilla.org/WebExtensions
Introduction to Mozilla's implementation of WebExtensions, a new browser
extension API.
https://wiki.mozilla.org/WebExtensions/FAQ
FAQ
http://arewewebextensionsyet.com/
Implementation coverage of WebExtensions API.
https://developer.mozilla.org/en-US/Add-ons/WebExtensions
WebExtensions API documentation.
https://developer.mozilla.org/en-US/Add-ons/WebExtensions/Comparison_with_XUL_XPCOM_extensions
Migration to WebExtensions from XUL/XPCOM.
https://developer.mozilla.org/en-US/Add-ons/WebExtensions/Anatomy_of_a_WebExtension
Anatomy of a WebExtension.