TweetFollow Us on Twitter

MacEnterprise: Managing FireFox

Volume Number: 24
Issue Number: 12
Column Tag: MacEnterprise

MacEnterprise: Managing FireFox

Configuring FireFox for your organization's environment

By Greg Neagle, MacEnterprise.org

Introduction

Although Safari is an excellent web browser, many organizations need to support Firefox as well for a variety of reasons. One very good reason is that it is a modern browser that runs natively on Windows, Linux, and OS X. If your organization supports multiple platforms, it makes sense to standardize on cross-platform applications like Firefox and Thunderbird when possible.

If you are supporting Firefox as a browser in your organization, you may need to pre-configure it for users in your environment. You may need to set up proxies, define your organization's home page as the default browser home page, and turn off application updates, among other things.

Unfortunately, Firefox does not respond to the Mac OS X administrator's standard bag of tricks for managing it. Workgroup Manager/MCX is of no use here, as the important settings are not stored in the org.mozilla.firefox.plist file in the user's preferences. By default, Firefox pays no attention to the system proxy settings. Even such time-honored tricks as copying in pre-defined preference files can be difficult with Firefox as it stores the user profiles at different paths, generated on the first run of Firefox.

A New Bag of Tricks

To manage Firefox in an enterprise environment, you'll need to learn a new bag of tricks. There are two things to learn:

How Firefox defines its preferences.

Where to define your preferences so Firefox will use them for all users on a given machine.

Firefox Preferences

Firefox is a descendant of the Mozilla browser, which was in turn descended from Netscape. Many of the mechanisms carry over from those browsers, and if you are looking for documentation on the Internet, you might want to broaden your search to those browsers as well.

Firefox uses JavaScript files to define its preferences. There are three JavaScript functions defined by Mozilla/Firefox you might use:

  • pref() - sets the current value of a preference. Useful for preferences you'd like to reset to defaults for each session, but to allow users to change during a session.
  • lockPref() - sets the value of a preference, and locks it so users can't change it. Useful to enforce certain policies.
  • defaultPref() - sets the default value of a preference. If the user has already set a value for this preference, this will have no effect.

What preferences can be set? You can get an idea of the vast array of available preferences by opening a Firefox window, and typing about:config into the URL field. If you are running Firefox 3, you might see a warning:


Ignore the sensationalism and click the "I'll be careful" button. You'll see a long list of available preferences:


Some of these correspond to preferences you can access from the Preferences window in Firefox, and others are hidden preferences. The important thing here is that you can get the preference name, its status, type and value, which you'll need in order to manage the preference.

In theory you can manage any of the preferences you find in about:config, but for this article we'll look at a subset. We'll explore how to manage proxy settings, the default browser check, and application updates. We'll also look at changing the default home page, but that actually uses a different technique, which we'll save for later.

Proxy Settings

To get started with managing the proxy settings, first configure them manually, using the Preferences window in Firefox:


In this example, I'm using an automatic proxy configuration URL, sometimes referred to as a "PAC file". Click OK, and once again, visit about:config. To narrow down what is displayed, type "proxy" in the Filter field:


The values we've set will have a status of "user set", and display in bold:


You can use a similar process to determine the correct names and values for most of the preferences you'd like to manage.

Here are the rest of the preferences we're going to manage for this article:


These control application and extension updates, updating the list of available search providers, and the check to see of Firefox is the default browser at launch. Since we are managing Firefox, we don't want users to be notified of newer versions of the application or extensions, and we don't want the user constantly prompted to set Firefox as the default browser.

Editing the Firebox Bundle

To actually get Firefox to use your desired preferences for all users of a given machine, you'll need to edit some files inside the Firefox.app bundle. You'll need to do the editing as either root (via the command line, perhaps using sudo), or as the owner of the files in the Firefox bundle; typically the admin user that installed Firefox.

Take care when editing. If you use a GUI editor, make sure you save any new or changed files as plain text and that no extra extensions are appended to the end of the filename.

You will start by editing the file /Applications/Firefox.app/Contents/MacOS/greprefs/all.js.

Add the following to the end of this file:

 // MyOrganization additions
pref("general.config.obscure_value", 0);
pref("general.config.filename", "firefox_AA.cfg");

Feel free to change "MyOrganization" to the actual name of your organization. What we're doing here is telling Firefox to read the file named here for additional configuration info. The "general.config.obscure.value" tells Firefox the file will be in plain text; by default it expects the file to be obscured with ROT13 encoding, where 13 is added to the ASCII value of every character. The reasons for this are lost in the mists of antiquity.

Save the /Applications/Firefox.app/Contents/MacOS/greprefs/all.js file. Now create a new file at /Applications/Firefox.app/Contents/MacOS/firefox_AA.cfg with the following contents:

// This file sets some prefs for use at MyOrganization
// and locks down some other prefs.
// set proxy config
pref("network.proxy.autoconfig_url", "http://www.myorg.org/auto.proxy");
pref("network.proxy.type", 2);
// disable application updates
lockPref("app.update.enabled", false);
lockPref("app.update.autoUpdateEnabled", false);
lockPref("extensions.update.enabled", false);
lockPref("extensions.update.autoUpdate", false);
lockPref("browser.search.update", false);
// disable default browser check
pref("browser.shell.checkDefaultBrowser", false);

Again, make sure you save it as a plain text file with the name "firefox_AA.cfg" in the directory "/Applications/Firefox.app/Contents/MacOS/". Double-check your work via the command line:

> cd /Applications/Firefox.app/Contents/MacOS/
> ls -al firefox_AA.cfg 
-rw-rw-r—  1 admin  admin  636 Jul 23 13:22 firefox_AA.cfg
> cat firefox_AA.cfg

That last command (cat firefox_AA.cfg) should return the exact contents you entered when you created the file.

In this example, we used two different commands: pref(), and lockPref(). For the proxy, I wanted the user to be able to modify the proxy if needed, but have it return to our recommended settings on the next launch. For the application updates, I wanted to prevent the user from turning these back on. Your requirements may differ.

With everything saved and double-checked, try launching Firefox. You should find these settings exactly as you specified, and in the case of the update prefs, locked:


Note how the corresponding controls are grayed-out and unavailable.

Default Home Page

One important preference is a little harder to manage: the default home page. You might get a clue of why this is so by looking at the preferences in about:config:


You'll see that the browser.startup.homepage points to another file, instead of just being a normal URL. You can set it to a normal URL, and it usually works, but I've found it unreliable. So instead of setting a preference, we'll edit the contents of browserconfig.properties:

Open /Applications/Firefox.app/Contents/MacOS/browserconfig.properties, delete its entire contents, and replace them with:

browser.startup.homepage=http://homepage.myorg.org
browser.startup.homepage_reset=http://homepage.myorg.org

Of course you want to substitute your own URL for the home page.

Now quit and relaunch Firefox. Unless you've set a custom home page, you'll be taken to the home page you defined. Users have the ability to override this if they want. If you truly wanted to enforce a home page, adding

pref("browser.startup.homepage", "http://homepage.myorg.org");
pref("browser.startup.homepage_reset", "http://homepage.myorg.org");

to /Applications/Firefox.app/Contents/MacOS/firefox_AA.cfg should get the behavior you want, but your users may dislike you.

Now that you've modified the Firefox.app bundle, you'll need to push out these changes to all your machines. I hope you have a software distribution mechanism in your organization!

More Info

Congratulations! You've added a few new tricks to your toolbox. For more information on Mozilla/Firefox preferences and configuration, check out these URLs:

http://kb.mozillazine.org/Firefox_:_FAQs_:_About:config_Entries

http://preferential.mozdev.org/preferences.html

http://developer.mozilla.org/en/Automatic_Mozilla_Configurator/Locked_config_settings


Greg Neagle is a member of the steering committee of the Mac OS X Enterprise Project (macenterprise.org) and is a senior systems engineer at a large animation studio. Greg has been working with the Mac since 1984, and with OS X since its release. He can be reached at gregneagle@mac.com.

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Latest Forum Discussions

See All

Soft Drummer (Music)
Soft Drummer 1.0 Device: iOS Universal Category: Music Price: $14.99, Version: 1.0 (iTunes) Description: Soft Drummer is the closest thing to a pro session subtle drummer in your pocket. Easy to use and fast, it's much more than a... | Read more »
Is GO Gear the Pokemon GO map app you...
Now that we've settled into something of a Pokemon GO status quo, the number one desire of most players can best be summed out by modifying a quote from Rod Tidwell of Jerry Maguire: "Show me the Pokemon!" [Read more] | Read more »
Rodeo Stampede update: Mountains, new an...
The Savannah and Jungle were just the beginning in Rodeo Stampede. Get ready to head for the Mountains. I think I heard that in a beer ad once. [Read more] | Read more »
COSMOS RINGS (Games)
COSMOS RINGS 1.0.0 Device: iOS iPhone Category: Games Price: $5.99, Version: 1.0.0 (iTunes) Description: This game cannot be played without the Apple Watch.Released anniversary sale until August 31,2016 PST! A tragic tale of time's... | Read more »
How to get started selling on Mercari
As far as ecommerce has come over the last decade or so, there's still a tremendous opportunity to make it easier for people to buy and sell goods. That's especially true when it comes to shopping apps, which should only continue to increase in... | Read more »
Human Anatomy Atlas 2017 Edition - Compl...
Human Anatomy Atlas 2017 Edition - Complete 3D Human Body 1.0.24 Device: iOS iPhone Category: Medical Price: $24.99, Version: 1.0.24 (iTunes) Description: | Read more »
Heroes of Normandie (Games)
Heroes of Normandie 1.5 Device: iOS Universal Category: Games Price: $14.99, Version: 1.5 (iTunes) Description: The game does not support iPhone 4s and below | Read more »
Why you should never power up Pokemon in...
There's no question that candy is dandy in Pokemon GO. You need big quantities of it to evolve your Pokemon, and when combined with stardust, it can be used to power up your favorite pocket monsters as well, making them more formidable for the gym... | Read more »
Webzen launches 3D MMORPG MU Origin on i...
Mu Origin is featured time and time again at the very top of App Stores in China, and within the top five worldwide top-grossing charts on Google Play.Its popularity in Korea and China, featuring more than 120 registered players in China and 6... | Read more »
Severed (Games)
Severed 1.0 Device: iOS Universal Category: Games Price: $5.99, Version: 1.0 (iTunes) Description: LAUNCH DISCOUNT ON NOW!! ENDS AUGUST 4! ==== Take control of a one-armed warrior named Sasha, wielding a living sword on her journey... | Read more »

Price Scanner via MacPrices.net

9-inch 32GB Space Gray iPad Pro on sale for $...
B&H Photo has the 9″ 32GB WiFi Space Gray Apple iPad Pro on sale for $50 off MSRP including free shipping. B&H charges sales tax in NY only: - 9″ Space Gray 32GB WiFi iPad Pro: $549 $50 off... Read more
15-inch Retina MacBook Pros on sale for up to...
B&H Photo has 15″ Retina MacBook Pros on sale for up to $200 off MSRP. Shipping is free, and B&H charges NY tax only: - 15″ 2.2GHz Retina MacBook Pro: $1849 $150 off MSRP - 15″ 2.5GHz Retina... Read more
Second-Quarter Tablet Shipments Fell 4.8% –...
The latest report from the global market research firm TrendForce finds that worldwide tablet shipments for this second quarter totaled 33.54 million units, representing a quarterly drop of 4.8% and... Read more
Global Smartphone Sales Volumes Mark Second S...
According to preliminary results from the International Data Corporation (IDC) Worldwide Quarterly Mobile Phone Tracker, vendors shipped a total of 343.3 million smartphones worldwide in the second... Read more
Apple TVs on sale for $20-$40 off MSRP
Best Buy has 32GB and 64GB Apple TVs on sale for $20-$40 off MSRP on their online store. Choose free shipping or free local store pickup (if available). Sale prices for online orders only, in-store... Read more
Mac minis on sale for $50-$100 off MSRP
B&H Photo has Mac minis on sale for $50 off MSRP including free shipping plus NY sales tax only: - 1.4GHz Mac mini: $449 $50 off MSRP - 2.6GHz Mac mini: $649 $50 off MSRP - 2.8GHz Mac mini: $949... Read more
Clearance 2015 13-inch MacBook Airs available...
B&H Photo has clearance 2015 13″ MacBook Airs available for $300 off original MSRP. Shipping is free, and B&H charges NY sales tax only: - 13″ 1.6GHz/4GB/128GB MacBook Air (MJVE2LL/A): $799... Read more
Apple certified refurbished iPad mini 4s avai...
Apple has certified refurbished iPad mini 4s now available for up to $120 off the cost of new models. An Apple one-year warranty is included with each iPad, and shipping is free. The following models... Read more
Notebook Makers In No Rush To Adopt USB-C – R...
Digitimes’ Cage Chao and Joseph Tsai note that while the USB Type-C interface is enjoying growing popularity among smartphones and tablet makers, notebook and all-in-one (AIO) PC vendors (other than... Read more
iMacs on sale for up to $250 off MSRP
B&H Photo has 21″ and 27″ Apple iMacs on sale for up to $250 off MSRP including free shipping plus NY sales tax only: - 27″ 3.3GHz iMac 5K: $2049 $250 off MSRP - 27″ 3.2GHz/1TB Fusion iMac 5K: $... Read more

Jobs Board

*Apple* Retail - Bilingual - Multiple Positi...
…speaking a plus Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the Read more
Simply Mac *Apple* Specialist- Repair Techn...
…The Technician is a master at working with our customers to diagnose and repair Apple devices in a manner that exceeds the expectations set forth by Apple Read more
*Apple* Mobile Master - Best Buy (United Sta...
What does a Best Buy Apple Mobile Master do? At Best Buy, our mission is to leverage the unique talents and passions of our employees to inspire, delight, and enrich Read more
Best Buy *Apple* Computing Master - Best Bu...
What does a Best Buy Apple Computing Master do? At Best Buy our mission is to leverage the unique talents and passions of our employees to inspire, delight, and Read more
*Apple* Valley, CA School Speech Therapy Ope...
Apple Valley, CA School Speech Therapy Openings + Job Location: Apple Valley, CA + Category: Schools - SLP - CFY + Apply Now! + Back to Results Speech Language Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.