Permanently loading Firefox add-ons

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Temporarely loading local Firefox add-ons is a straightforward process. Loading them permanently takes a few more steps:

  1. Download and install Firefox-developer version.
  2. Disable the xpi signature verification in about:config:
xpinstall.signatures.required=false
extensions.langpacks.signatures.required=false

    3. Go to the extension directory and generate a xpi file:

cd path/to/extension_name
zip extension_name.xpi *

    4. Go to about:addons.
    5. Drag and drop extension_name.xpi into the add-ons tab
    6. Click in the add-on and select "Allow automatic updates" and "Run in private windows".