Firefox Tweak Guide
[Page 8] Add-Ons
One of the major attractions of Firefox is the seemingly endless ways in which you can customize its functionality and appearance. There are a range of add-ons - mainly Extensions and Themes - which you can download to allow you to customize and enhance Firefox to a great extent. This section details a few of them and is a good introduction to experimenting with add-ons in Firefox. Advanced Firefox users would probably be quite familiar with this topic and have their own favorite add-ons, so this section may not be as useful to them.
Installing Add-Ons
There are a huge range of add-ons available for Firefox, and you can search for and download these either directly through the 'Get Add-ons' tab in the Add-ons Manager (found under Tools>Add-ons), or you can search and browse for add-ons at the Official Firefox Add-ons Site. As of Firefox 3, many previous popular add-ons will not work, so you may not be able to install certain add-ons for that reason.
When installing an add-on, you may first receive a prompt. It is strongly recommended that you pay careful attention to the type of add-on being installed, and the details provided as to its origins. If in doubt, click Cancel and do further research about the add-on on Google to ensure it does not cause any unintended problems or security issues. Add-ons on Mozilla's official site linked above should always be safe in terms of security concerns, however that doesn't guarantee their stability or functionality, so a little bit of research always helps. In any case if you continue with the installation of the add-on, the Add-ons Manager will open (if it isn't open already) - the Add-ons Manager has been revamped as of Firefox 3, and these new features are covered in greater detail under the 'Add-ons Manager' area of the Features, Tips and Tricks section.
Every time you install an add-on, once it has been downloaded and installed, it will require a restart of Firefox to come into effect. This will be clearly noted in the Add-ons Manager, however if you change your mind, before restarting go to the Extensions or Themes tab, highlight the new add-on and select Cancel to prevent it installing itself; otherwise restart Firefox and upon restart the Add-ons Manager will again open to confirm whether the add-on has been installed correctly, or if there has been any problem with the installation.
Below we look at some recommended add-ons you might to consider - these are all compatible with Firefox 3.
Extensions
Extensions provide additional functionality in Firefox. Once an extension is installed and Firefox is restarted, you can experience the additional functionality straight away. For troubleshooting purposes I don't recommend installing too many extensions at once, as this might cause strange behavior in Firefox or affect performance, so gradually install the extensions you need and experiment to determine if they affect performance and/or stability, and only keep the extensions you genuinely need.
Note: If an extension doesn't work with your current Firefox version, you can still force it to be used by changing both the extensions.checkCompatibility and extensions.checkUpdateSecurity preferences to False - see the Advanced Tweaking section. This is not recommended as it can cause a lot of problems with some add-ons; it's best to wait for updated versions of the relevant extensions.
Some of the more useful Firefox extensions which are currently compatible with Firefox 3 that you might like to try are listed below, along with brief descriptions:
IE Tab - A few web pages still don't display correctly on Firefox, or only allow the use of Internet Explorer to view them correctly (e.g. Windows Update in XP). This extension allows you to quickly view a page using the IE rendering engine, in a new tab within Firefox.
NoScript - This extension gives you far greater control over the way Javascript, Java and other executable content is run on various websites. Scripts are notorious for being abused by malicious or annoying websites, and once you've added your trusted websites to the list, Noscript will protect you from most malicious or annoying content, also allowing you to toggle script on or off as needed.
Adblock Plus - This extension allows you to block specific ad elements on any web page, preventing them from loading in the future. Remember however that if you block all ads you will eventually contribute to the demise of your favorite sites. Ads are essentially what makes the Internet free to browse, so be cautious with what you block, or alternatively consider donating to sites which you like but for which you block all ads.
DownThemAll - Firefox's default Download Manager has improved quite a bit in Firefox 3, however you may still have need of a more advanced download utility. DownThemAll makes downloading from multiple links much easier, can improve download speeds, and allows better management of downloaded files such as auto-renaming.
FlashGot - This extension requires one of the supported external download managers, but in turn incorporates the external download manager into Firefox, adding a wide range of functionality not possible with the default Firefox Download Manager.
GreaseMonkey - This extension allows you to completely customize the way any web page looks or behaves. This is done through the use of user-made scripts - you can search and browse through existing scripts here, and find out more about how to create scripts here.
Gmail Notifier - If you use the free Gmail webmail service, this extension allows you to monitor your Gmail account(s) from within Firefox, getting notification of new messages while browsing other sites for example.
Forecastfox - Allows you to display local and international weather forecasts unobtrusively within Firefox. You can also determine how far ahead the forecasts run.
FoxyTunes - This extension lets you control any media player through Firefox, while also giving you access to a wide range of information about the music you are listening to, such as lyrics and videos.
FireGestures - This extension allows you to use mouse gestures - movements of your mouse in particular ways - to activate common browser commands in Firefox, like back, forward and close tab.
This list is in no way comprehensive or representative of all you can do with extensions, it is simply some of the more popular extensions which you may find useful. Each person will have his or her own personal favorites, so I encourage you to start searching through the add-ons to see what you can find.
Themes
Themes are basically skins for Firefox, changing its visual appearance but not affecting its functionality. Installation of themes is similar to extensions. As with extensions, many themes may not be designed for use with Firefox 3 or newer.
Some of the Themes I personally like which are compatible with Firefox 3 include:
Of course themes are highly subjective, so I recommend you spend some time browsing the available themes for yourself to see what else you can find that may be more to your taste.
Plugins
Plugins provide Firefox with the ability to play or view a range of web-based media, such as PDF documents, animated content, videos or music. If you find that Firefox doesn't have the plugin required for particular content on the page you are viewing, you will usually be prompted to install the relevant plugin to continue. You can download the most common plugins directly from this section of the Official Mozilla Add-ons Site. Note that if a site prompts you to install a plugin and it is not a 100% trusted and reputable site, I strongly recommend cancelling such attempts until you can find out more about the plugin that is going to be installed. Do a search on Google for example to see what the plugin does, as even if it is not malicious, it may conflict with or slow down your normal browser functionality, or introduce behavior that you don't like - don't just assume that having dozens of plugins installed on Firefox is a good thing.
Dictionary & Language Packs
As noted on page 3 of this guide, it is recommended that you install the correct language edition of Firefox for your region. However if you want to install additional dictionary or language pack for Firefox, see this section of the Official Mozilla Add-ons Site.
There are literally thousands of other Firefox add-ons you can download and try for yourself. This is one of Firefox's strengths - its open source code and large community mean that virtually any kind of feature, function or appearance you desire in a browser is likely to be available somewhere, or is being made as we speak. Of course I must stress once again that if you are experiencing any odd behavior or issues in Firefox, one of the first things you should do is try uninstalling any recent extensions or themes in case they are the cause of the problem.
The next section begins our look at Advanced Tweaking in Firefox.
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