"Reload" button for an extension, if it is loaded from disk, reloads the extension itself but not updated files from disk.
Steps to reproduce:
Load an extension from disk and change any file (e.g. JS file). Updates are not loaded with pressing "Reload", only on re-installation.
Reload files from disk. Better for e.g. "New Tab" extension (like in Chrome) that updated files on disks automatically loaded on each new tab without pressing "Reload".
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