Install script for ungoogled-chromium. It downloads deb files for Ubuntu Xenial Xerus 16.04 and installs with dpkg. Used on Gallium Os without problems.

chromium-extension-downloader.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from json import dumps
import requests
import re
import sys
import os

# Given the extension url(s) as parameter(s) it downloads the extension(s) to '$HOME/Downloads',
# and creating a .json file in '/usr/share/chromium/extensions'. Next time Chromium starts up,
# it will load the extension(s) automatically.

PY3 = sys.version_info[0] == 3
if PY3:
	from urllib.request import urlretrieve
else:
	from urllib import urlretrieve

if os.geteuid() != 0:
	print 'This will need sudo...'

links = sys.argv[1:]
downloadlink = "https://clients2.google.com/service/update2/crx?response=redirect&prodversion=47.0&x=id%3D{}%26installsource%3Dondemand%26uc"
extensionids = []
regexx = re.compile("http[s]?.+\/(?P<lastpart>.+)")
for link in links:
	id = regexx.search(link).group("lastpart")
	if '?hl=' in id:
		id = id.split('?')[0]
	extensionids.append(id)

headers = {"User-Agent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.73 Safari/537.36"}
for extensionid in extensionids:
	htmldata = requests.get(link, headers=headers).content
	name = re.compile('<h1 class="e-f-w">(.+?)</h1>').search(htmldata).group(1)
	slugname = re.sub('[^\w\s-]', '-', re.sub('[-\s]+', '-', name)).strip()
	version = re.compile('<span class="C-b-p-D-Xe h-C-b-p-D-md">(.+?)</span>').search(htmldata).group(1)

	link = downloadlink.format(extensionid)
	extensiondownload = requests.get(link,headers=headers).url
	urlretrieve(extensiondownload, os.path.expanduser('~') + "/Downloads/{}_v{}.crx".format(slugname, version))
	print extensionid

	
	jsondir = '/usr/share/chromium/extensions/'
	jsonfilename = '{}{}.json'.format(jsondir, extensionid)
	if not os.path.exists(jsondir):
		os.system('sudo mkdir ' + jsondir)
	os.system('sudo touch ' + jsonfilename)
	os.system('sudo chmod 777 ' + jsonfilename)

	with open(jsonfilename, 'w+') as f:
		jsondata = {'external_version': version, 'external_crx': '/home/fivethous/Downloads/{}_v{}.crx'.format(slugname, version)}
		f.write(dumps(jsondata, indent=4, sort_keys=True))
		f.truncate()
		f.close()

u-cvc.py

#!/usr/bin/env python
## NOTICE ##
## This script is incomplete, but works alright in linux. ##
############################################################
##
## Checks for new releases every 30 minutes.  ##
## Notifies with a prompt to the github page. ##
##
##
from platform import linux_distribution, system
from urllib2 import urlopen
from json import load, dumps
from subprocess import Popen, check_call, CalledProcessError
from time import sleep

def zenity(url):
	try:
		check_call(['zenity', '--question', '--text', 'ungoogled-chromium update ready. Open github page?'])
	except CalledProcessError:
		pass
	else:
		Popen(['chromium', url])


### SETTINGS ###
os = system().lower()
dist = linux_distribution()
if os == 'linux':
	ct = 'application/vnd.debian.binary-package'		
if os == 'darwin':
	ct = 'application/x-apple-diskimage'
if os == 'windows':
	ct = 'application/zip'
if dist[-1] == '':
	dist = dist[-2]

### MAIN ###
def output():
	url = 'https://github.com/Eloston/ungoogled-chromium/releases/' + data['tag_name']
	zenity(url)
	#def notify(message):
	#	Popen(['notify-send', message])
	#	return
	#notify('Download URL: %s' % i['browser_download_url'])
	#notify('Version: %s' % data['tag_name'])

while True:
	try:
		resp = urlopen('https://api.github.com/repos/Eloston/ungoogled-chromium/releases/latest')
		data = load(resp)
		for i in data['assets']:
			if i['content_type'] == ct:
				if os == 'linux' and dist in i['name']:
					output()
				output()
			else: print 'No updates for your os available.'
		sleep(30)
	except:
		print 'Something went wrong. Internet connection?'
		sleep(5)
		continue

ungoogled-chromium_installer.sh

#!/bin/bash
clear

RED='\033[0;31m'
YELLOW='\033[1;33m'
NC='\033[0m'

echo -e "\nThis script downloads and installs the ungoogled-chromium.\n"
echo -e "${YELLOW}\tVersion: 53.0.2785.116-1\n" \
	"\tArchitecture: amd64\n"
echo -e "\tThese Debian packages are built for Ubuntu Xenial,\n" \
	"\tbut may work on other Ubuntu based distributions.\n${NC}"

if [ $EUID -ne 0 ]; then
	echo -e "${RED}This needs sudo.\n${NC}"
	exit 1
fi

trap ctrl_c INT
function ctrl_c() {
        echo -e "\n\n\n${YELLOW}CTRL-C: removing files and quitting...${NC}"
	rm -f /tmp/xenial*.deb
	exit
}

cd /tmp
echo -e "${YELLOW}\nWent into /tmp directory."
echo -n "Now downloading Debian packages from github...${NC}"
wget -q "https://github.com/Eloston/ungoogled-chromium/releases/download/53.0.2785.116-1.1/xenial_chrome-sandbox_53.0.2785.116-1_amd64.deb" \
	"https://github.com/Eloston/ungoogled-chromium/releases/download/53.0.2785.116-1.1/xenial_chromedriver_53.0.2785.116-1_amd64.deb" \
	"https://github.com/Eloston/ungoogled-chromium/releases/download/53.0.2785.116-1.1/xenial_chromium-l10n_53.0.2785.116-1_all.deb" \
	"https://github.com/Eloston/ungoogled-chromium/releases/download/53.0.2785.116-1.1/xenial_chromium_53.0.2785.116-1_amd64.deb"
echo " ${YELLOW}Done."

echo -e "Installing ungoogled-chromium...\n${NC}"
dpkg --force-overwrite -i xenial_chromium_53.0.2785.116-1_amd64.deb \
	xenial_chromium-l10n_53.0.2785.116-1_all.deb \
	xenial_chrome-sandbox_53.0.2785.116-1_amd64.deb \
	xenial_chromedriver_53.0.2785.116-1_amd64.deb
if [[ $? == 0 ]]; then
	echo "${YELLOW}Done."
else
	echo -e "${YELLOW}Something went wrong${NC}. Check the log, it might not be anything crucial."
fi
echo -ne "\nRemoving .deb files..."
rm -f /tmp/xenial*.deb
echo " Done.${NC}"
echo "Bye"

## Implement github api later
## https://api.github.com/repos/Eloston/ungoogled-chromium/releases

ungooogled-chromium extensions

uBlock Origin:
https://clients2.google.com/service/update2/crx?response=redirect&prodversion=48.0&x=id%3Dcjpalhdlnbpafiamejdnhcphjbkeiagm%26installsource%3Dondemand%26uc

LastPass:
https://clients2.google.com/service/update2/crx?response=redirect&prodversion=48.0&x=id%3Dhdokiejnpimakedhajhdlcegeplioahd%26installsource%3Dondemand%26uc

Extension Downloader:
http://chrome-extension-downloader.com/extension-downloader.crx

Vanilla Cookie Manager:
https://chrome.google.com/webstore/detail/vanilla-cookie-manager/gieohaicffldbmiilohhggbidhephnjj

Global New Tab Shortcut:
https://chrome.google.com/webstore/detail/global-new-tab-shortcut/dcngopenklmnfdlfocljeaokkhcplong