Add DEPRECATION note to README #12

	name: Publish Firefox # Name of your workflow

	on:
	workflow_dispatch: # Allows you to manually trigger workflow
	push:
	# Triggers workflow only if code is pushed to master/main branch
	branches: [ master, main ]

	jobs:
	Firefox: # Job name
	name: Publish Firefox
	runs-on: ubuntu-latest # specify required OS for deployment machine

	steps:
	- uses: actions/checkout@v2 # Download your source code to the DM
	- uses: actions/setup-node@v1
	with:
	node-version: 16
	- name: Build
	run: \|
	npm install
	npm run build
	- name: Build Extension for Firefox
	id: web-ext-build
	uses: kewisch/action-web-ext@v1
	with:
	cmd: build
	source: dist
	channel: unlisted

	- name: 'Sign & publish'
	id: web-ext-sign
	uses: kewisch/action-web-ext@v1
	with:
	cmd: sign
	channel: listed
	source: ${{ steps.web-ext-build.outputs.target }}
	apiKey: ${{ secrets.FIREFOX_API_KEY }}
	apiSecret: ${{ secrets.FIREFOX_CLIENT_SECRET }}

	- name: Drop artifacts
	uses: actions/upload-artifact@v2
	with:
	name: 'Firefox Artefacts'
	path: ${{ steps.web-ext-sign.outputs.target }}

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