Develop our first own plugin/extension for Mozilla Firefox / Part 1 / First npm error on windows platform.

Firstly, you need instal this tool: JPM
Installing from GitHub to get latest features or working on jpm itself, use npm link to add the jpm global to your path:

git clone https://github.com/mozilla/jpm.git
cd jpm
npm install
npm link
And “hello” error:

Error: ENOENT, stat ‘C:\Users\%username%\AppData\Roaming\npm’

Easy fix:
npm install npm -g

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