Created Chromium Install (markdown)

Chromium-Install.md

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+### Google Chrome Instructions:
+
+I recommend Chromium instead of Google Chrome, since it's open source and doesn't send your data to Google.
+Chromium may have some issues rendering some sites though, so you're welcome to try Google-chrome instead.
+It's also easier to use Google Chrome if you already have it installed, rather than downloading Chromium all over.
+
+1. Install & link google-chrome
+```bash
+# On Mac:
+# If you already have Google Chrome in /Applications/, skip this brew command
+brew cask install google-chrome
+brew install wget python3
+
+echo -e '#!/bin/bash\n/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome "$@"' > /usr/local/bin/google-chrome
+chmod +x /usr/local/bin/google-chrome
+```
+
+```bash
+# On Linux:
+wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add -
+sudo sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google-chrome.list'
+apt update; apt install google-chrome-beta python3 wget
+```
+
+2. Set the environment variable `CHROME_BINARY` to `google-chrome` before running:
+
+```bash
+env CHROME_BINARY=google-chrome ./archive ~/Downloads/bookmarks_export.html
+```
+If you're having any trouble trying to set up Google Chrome or Chromium, see the Troubleshooting section below.