17 Extensions to help the transition from Firefox to Chrome

I’m finally done with Firefox. When I first started using Firefox, the add-ons were a game-changer & I loved how much extra functionality they added to my day-to-day work.

Today, Chrome dominates the market, is waaay faster, and at the end of 2017 Mozilla is changing the add-on framework so some of the ‘classic’ add-ons I use will cease to work.

The final straw was seeing how fast Chrome way for general browsing and content creation; so much snappier than Firefox. Maybe that’s down to an ageing Firefox user profile.. but, IMO, Chrome is the future.

To ease my transition from Firefox to Chrome I’m using a bunch of extensions that give me the features I’ve grown used to. I thought I’d list out what I’m using so that others might benefit from knowing they’re out there & how useful they can be.

Adblock Plus
Blocks adds. I’d tried uBlock.. but found it breaking a bunch of sites.. so back to this one I’ve used for years in Firefox.

Akamai debug headers
Makes it simple to see what’s happening with websites fronted by the Akamai CDN.

Awesome Screenshot
Full-page screenshots

Cookie Inspector
Enables editing + adding of Cookies (I guess one day the Chrome devs will add this into the core app.. one day).

Downloads Router
Routes certain file types to certain folders. Bit of a faff to set up, but I find it useful for filing downloads into set folders.

Fauxbar
The Chrome omnibar isn’t great for finding URLs I had open hours/days ago (Firefox was brilliant). This sorts out that problem & does a pretty good job at indexing everything nicely.

In addition to that, it gives you a neat menu bar with shortcuts to a whole bunch of things; bookmarks, extensions, apps, options, etc. The configurable tiles for sites is super-handy too.

HostAdmin App
Quick and easy host file editor.. especially useful if you’re using proxy exceptions to speed up access to certain internal sites, and want to be able to configure or toggle the entries easily.

LastPass
Excellent cross-device password manager.

ModHeader
Modify browser headers. Useful for testing things like GeoIP.

Open IE
Adds in a context menu to open the current URL or link in other browsers (IE, Firefox, Opera, etc). Need an external helper program installing in Windows.

Page Monitor
Monitor web pages for changes.. works best when you set the Advanced option to look at a particular part of the page using CSS selectors.

Proxy SwitchyOmega
Set up multiple proxies and easily switch between them via the toolbar button.

SimpleUndoRecents
This will give you a button where you can undo the accidental closing of a tab. (TabMixPlus did something similar in Firefox).

Tampermonkey
Lets you run scripts against web pages each time you load the page.. essentially allowing you to alter the page after it renders. Super handy for removing or adding elements to the page. This extension is the equivalent to Greasemonkey on Firefox.

The Camelizer
Nothing to do with work.. but essential all the same. Lets you see the price history for products on Amazon.. and set alerts for price fluctuations.

Web Developer
Handy tools for developers.

Xmarks Bookmark Sync
Synchronise bookmarks between multiple browsers on multiple PCs.. even has version history in case you delete bookmarks by accident.

 

Honorary mention..

An extension called Postman would have made this list a few months ago.. but it’s moved to a stand-alone application for Windows + Mac. It’s another essential bit of kit for developers; if you’ve not checked it out, go take a look.

MIA…

That covers all but one of the Firefox add-ons I used to use. The one I still miss is Locationbar2, which I simply can’t find an equivalent for in Chrome.

It essentially makes each part of a site’s URL a clickable link.. which is super handy for quickly moving through a site’s structure.

If anyone spots something suitable, hit me up in the comments.

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Home Automation Project – Raspberry Pi Heating Controller – Part 1

pi-controlI’m going to build a home automation project which connects a Raspberry Pi to control my central heating. I wasn’t particularly happy ripping out all the existing controls, and wanted to piggyback onto them.. which helps if the Pi ever fails (I’ve still got the old controls to fall back on).

I also didn’t want to mess with the existing heating control board, so bought a duplicate unit (British Gas UP2) from eBay for about £12.. I can perfect the project on that, and install it when I’m ready.

This set of videos goes through each step of the project.. starting off with opening the control board, an overview of what I want to do, and testing out the changes.

Opening up the Control Panel

This was a bit tricky.. it wasn’t quite obvious which plastic clips needed pushing in to pull the board out.. if you were doing this on your actual panel (not an eBay-bought duplicate) then this video should help work out what you need to do to get into it without damaging anything.

 

Project Overview

Next up, I’ll quickly go over what I intend to do to piggyback onto the control board. There’s a project here which did exactly what I wanted to do. He’s not using a PiFace 2 like I intend to use, and he wants to be able to control the hot water as well, but everything else is the same.

 

Safety First – Masking off the High Voltage Area

In this second video, I’ll show how I’m masking off the high voltage area of the board to make it a bit safer when I’m testing things out. Obviously most of the time the board is off, but this helps keep things safer when it is on without the cover.

 

Identifying Solder Points

Luckily this blog gave me a good starting point, but it wasn’t clear where to get the status of the central heating.. I used a multimeter to find a spot which changed voltage when the system was on, and this diagram shows you what I found;

pi-heat-3

Soldering

Since I only needed 4 wires for this project (2 for the switch, and 2 for the system state), I took an old USB cable, cut the ends off, stripped the wires and soldered it to the board without much trouble.

pi-solder

Soldering Complete!

This shows the control board after the soldering has been completed.. it’s pretty simple soldering; the only tricky part was finding the points to connect to for the system state (on/off). I’ve stuck down some of the wires so that they don’t catch or get stuck underneath the control boards buttons.

 

Testing the Wiring

Now that I’ve done the soldering, I’m testing out the wiring.. seeing whether connecting the two wires for the switch turns the central heating on, and when it is on, whether we get voltage on the other two wires to indicate the system state.

 

Controlling from Software

I’ve now hooked it up to the Pi Face 2 board, which can be controlled with a few lines of Python to simulate a button press, and detect the state of the system.

With these basics in place, the rest of the control software can be written to do scheduling, bring in temperature readings, and allow the system to be controlled remotely.

Controlling Power Sockets using a Raspberry Pi

The subwoofer we had in our home cinema setup died a few weeks ago, so I did my research and found a nice replacement. The only thing I didn’t spot was the fact it never goes into standby if there’s no signal (unlike the old one). I tried using some eco plugs which turn off peripherals when the TV was turned off.. but it learns the TV remote signals, and completely turns the TV off as well.. meaning that you have to hit the power button twice to turn the TV back on; that doesn’t work well with the Harmony all-in-one remote we use.

What I decided to do was buy an Energenie socket, which can be switched on/off wirelessly from a Raspberry Pi. The kit comes with 2 sockets and a transmitter to attach to the GPIO headers on the Pi, and costs about £20.

In my subwoofer scenario I basically want it switched on when the TV is on, and off when the TV is off. The TV has a Chromecast plugged into it which is visible on my local network. If you’ve got a Smart TV on your network, maybe that’ll be visible in the same way. So when the TV/Chromecast appear on the network, we know to switch on the power socket.

energeniesockets

Here’s the small Energenie transmitter attached to the GPIO headers on my B+.. it’s pretty tiny and the case I’ve got still fits over the top. Notice the small hole where you can attach an aerial.. if you want extra range, then you’ll need to solder one on.. I added a 135mm wire, since the range I got out of it just wasn’t enough to get from the dining room cupboard to the living room.

energeniepi

 

To put this together, we can use the Raspberry Pi Network Spy code I wrote in my previous blog posts on element14;

Raspberry Pi Network Spy – Part 1 – Initial Setup + d/b Schema
Raspberry Pi Network Spy – Part 2 – D/b Setup + PHP for the scanner

All we need is a new PHP page that’ll call one of the functions we’ve already written.. we need a list of the MAC addresses that are currently visible on the network, then check whether the Chromecast is there. Once we know whether the TV/Chromecast is on or off, we then call a Python script that will turn the Energenie socket on/off.

Here’s the PHP;

arp-chromecast.php

The Python script could follow the Energenie example script, but there’s actually an even more simple Python package which I’ve used in this project. To install it I did the following;

sudo apt-get install python-pip
sudo pip install energenie

Then I wrote this helper Python script (which we’ll call from PHP) that accepts a couple of parameters, like this callenergenie.py [on|off] [switch_number];

callenergenie.py

from energenie import switch_on, switch_off
import sys

if len(sys.argv)==1:
print ‘Please specify arguments like this callenergenie.py [on|off] [switch_number]’
print ‘eg. callenergenie.py on 1’
print ‘eg. callenergenie.py off 2′
else:
on_or_off = sys.argv[1]
which_switch = int(sys.argv[2])

if (on_or_off==’on’):
print ‘Switching on ‘, which_switch
switch_on(which_switch)

if (on_or_off==’off’):
print ‘Switching off ‘, which_switch
switch_off(which_switch)

Now that we’ve written the PHP & Python, all we need to do is run the PHP every minute to scan the network and do the switching. We’ll do this using another cron job;

crontab -e

*/1 * * * * sudo /usr/bin/php /var/www/arp-chromecast.php

Using Wireshark and MITM to explore a STB

I’ve recently bought a new Freeview HD box from 3view. It has a whole host of features and can be considered a “connected” device. As with most high-end set-top-boxes (STB) it pulls software firmware updates from the web, and I was interested to see where it went to get these updates & how it knew they were available.

I know about using tools to sniff network traffic, but have only done this to sniff traffic coming directly out of the PC I’m running the capture software on. Buying this 3view box gave me more of an inventive to expand my knowledge & figure out how to capture the traffic from other devices.

It was actually relatively easy. I decided to do a Machine in the Middle (MITM) ‘attack’ which was documented over at the Wireshark wiki.

In my case I didn’t have 2 network cards, but did have a laptop with one network card, and a wireless card. In Windows XP I bridged the NIC to the Wireless adapter, then plugged in a cross-over cable that linked the 3view box to my laptop. Then, after a bit of messing about with IP addresses it started working.. my 3view box was accessing my wireless router via my laptop.

Now that all the traffic from the 3view box was going via my laptop, all I then needed to do was fire up Wireshark & take a look at the packets.

Intercepting the traffic allowed me to see where the box was going for it’s updates, and the User Agent. That’s been documented over at the 3viewer community website I set up for 3view owners.

http://3viewer.elementfx.com/

QR Code Bookmarklet

QR Codes are a useful way of getting data to your mobile phone using it’s built-in camera. They’re basically 2D barcodes that can carry things like URLs and contact details. On Android I’d recommend using the app called Barcode Scanner to read QR Codes.

There were instances where I wanted to open up a webpage with a long URL on my phone & didn’t want to go through the hassle of copying and pasting it into one of those online QR Code generators.

This bookmarklet for Firefox and newer versions of IE lets you create a QR Code for the page you’re on.. it’ll default to the current page, but you can also override this with something else (like a URL from your clipboard, or whatever).

Add a new bookmark to your toolbar, and set the URL to the code below (I’d have put the proper link on here but WordPress disables the Javascript);

javascript:var%20sCode=prompt('Enter%20URL%20to%20encode',window.location);void(window.open('http://chart.apis.google.com/chart?cht=qr&chs=300x300&chl='+encodeURIComponent(sCode),'Qr%20code','top=100,left=200,width=350,height=350,status=yes'));

iPhone and Android development with Titanium

Over the past few months I’ve worked on a couple of mobile applications for the iPhone and Android platforms. I’d looked at Phonegap some time before that, but determined that it wasn’t up to the job, but more recently I stumbled across Titanium from Appcelerator. The idea is that you code up your apps using HTML and Javascript. The Javascript calls the Titanium API to create things like lists, dialog boxes, and phone features such as geolocation.

Some of the advantages of using Titanium are:

– No need to learn Objective-C (iPhone) or Java (Android)
– Leverage existing HTML + Javascript skills
– Write one version of the code that can be deployed to both platforms
– Code is compiled up into native applications which are accepted in the App Store
– Potential to deploy to other platforms in the future (e.g. Blackberry, Symbian)

The level of support provided by the Appcelerator staff on the official forums is brilliant, and the tutorial videos are good for those who want to get an overview of creating apps without wading through documentation.

You’ll still need a Mac if you want to develop for the iPhone, because Titanium makes use of the iPhone SDK. But if you just want to do Android development then you can use Window or Linux as well.

Although you’ll be developing 1 set of code for both the iPhone and Android, you’ll probably want to customise the UI slightly differently for each platform. For example, Android apps often hide away items such as ‘Settings’ and ‘Help’ under the Menu button. It’s simple to code this kind of thing up:

	if (Titanium.Platform.name == 'android') {
		var menu = Titanium.UI.createMenu();
		menu.addItem("Help/About", function() {
			displayWindow('Help / About', 'window_about.html');
		}, Titanium.UI.Android.SystemIcon.HELP);
		Titanium.UI.setMenu(menu);
	} else {
		data.push({title:'Help / About',image:'tabicon_help.png', color:'#ffffff'});
	}

That code will create the Help/About option under a menu on Android, and add it to the home screen’s list on the iPhone. Simple.

Titanium is an awesome framework so if you’re considering developing for the iPhone and/or Android then I’d highly recommend you take a look.

Power Meter Plus in PC Pro Magazine

pc-pro-logo Power Meter Plus has been getting a lot of coverage this month; it’s been mentioned on dozens of blogs and now in PC Pro magazine issue 172, in fact I think Lifehacker might have picked up on it from there & the blogs picked up on Lifehacker’s article.

pcpro-jan-2009