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7 Great Firefox about:config Tweaks8 min read

Sep 22, 2022 6 min

7 Great Firefox about:config Tweaks8 min read

Reading Time: 6 minutes

Firefox is a great browser with a ton of customization options. Many of these options are hidden in the about:config page. Here are 7 great about:config tweaks for Firefox that can improve your browsing experience.

1. Improve Firefox’s Startup Time

2. Make Firefox Run More Smoothly

3. Save Tons of Disk Space By Clearing Cache

4. Get Rid of Annoying Toolbars and Extensions

5. Speed Up Firefox Browsing

6. Improve Security and Privacy Settings

7. Customize Firefox to Your Liking

7 Great Firefox about:config Tweaks

How to access about:config

To access the about:config page in Firefox, type about:config into the address bar and press Enter. You will be presented with a warning message telling you that modifying the settings on this page can be dangerous. Click the button labeled “I accept the risk!” to continue.

On the about:config page, you can modify a variety of settings that control how Firefox behaves. In this article, we’ll go over some of the most popular and useful about:config tweaks.

To modify a setting, simply double-click on it. A dialog box will appear where you can enter the new value. Once you’re finished, close the dialog box and the changes will be applied.

Tweak #1: customizing the interface

If you’re like me, you’re always looking for ways to tweak and customize your web browser to make it work just the way you want it to. And if you’re using Firefox, one of the best ways to do that is by tweaking the about:config settings.

There are a lot of about:config settings to choose from, and it can be a bit overwhelming trying to figure out which ones to change. But don’t worry, I’ve got you covered. In this article, I’m going to share with you seven of the best about:config tweaks for Firefox.

So let’s get started!

The first about:config tweak I recommend is changing the way the interface looks. By default, Firefox uses a light theme, but you can change it to a dark theme if you prefer. To do this, simply type “about:config” into the Firefox address bar and press Enter. Then, in the search bar at the top of the page, type “ui.theme.dark”.

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Next, double-click on the “ui.theme.dark” setting to change its value from “false” to “true”. This will enable the dark theme for Firefox. If you want to go back to the light theme later, simply change the value back to “false”.

The second about:config tweak I recommend is disabling the new tab page. By default, when you open a new tab in Firefox, it will show you a list of your most visited websites. But if you’d prefer to see a blank page instead, you can disable this feature.

To do this, type “about:config” into the Firefox address bar and press Enter. Then, in the search bar at the top of the page, type “browser.newtabpage.enabled”. Next, double-click on the “browser.newtabpage.enabled” setting to change its value from “true” to “false”.

The third about:config tweak I recommend is changing the default search engine. By default, Firefox uses Google as its default search engine. But if you prefer to use another search engine, such as DuckDuckGo or Bing, you can change the default.

To do this, type “about:config” into the Firefox address bar and press Enter. Then, in the search bar at the top of the page, type “browser.search.defaultenginename”.

Next, double-click on the “browser.search.defaultenginename” setting and enter the name of the search engine you want to use as the default. For example, to use DuckDuckGo as the default, you would enter “DuckDuckGo”.

The fourth about:config tweak I recommend is disabling the built-in PDF viewer. By default, Firefox comes with a built-in PDF viewer that allows you to view PDF files without having to download them.

However, this PDF viewer is known to be buggy and can cause problems with some PDF files. If you’d prefer to use a different PDF viewer, such as Adobe Reader, you can disable the built-in PDF viewer.

To do this, type “about:config” into the Firefox address bar and press Enter. Then, in the search bar at the top of the page, type “pdfjs.disabled”.

Next, double-click on the “pdfjs.disabled” setting to change its value from “false” to “true”. This will disable the built-in PDF viewer in Firefox.

The fifth about:config tweak I recommend is increasing the maximum number of simultaneous connections. By default, Firefox allows up to six simultaneous connections. But if you want to increase the number of connections, you can do so by changing the “network.http.max-persistent-connections-per-server” setting.

To do this, type “about:config” into the Firefox address bar and press Enter. Then, in the search bar at the top of the page, type “network.http.max-persistent-connections-per-server”.

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Next, double-click on the “network.http.max-persistent-connections-per-server” setting and enter a higher number. For example, to increase the number of connections to 10, you would enter “10”.

The sixth about:config tweak I recommend is disabling the auto-update feature. By default, Firefox checks for updates automatically and installs them automatically. But if you’d prefer to update Firefox manually, you can disable the auto-update feature.

To do this, type “about:config” into the Firefox address bar and press Enter. Then, in the search bar at the top of the page, type “app.update.auto”.

Next, double-click on the “app.update.auto” setting to change its value from “true” to “false”. This will disable the auto-update feature in Firefox.

The seventh and final about:config tweak I recommend is changing the way downloads are handled. By default, Firefox will save downloads to the “Downloads” folder in your home directory. But if you’d prefer to choose where each download is saved, you can change the “browser.download.useDownloadDir” setting.

To do this, type “about:config” into the Firefox address bar and press Enter. Then, in the search bar at the top of the page, type “browser.download.useDownloadDir”.

Next, double-click on the “browser.download.useDownloadDir” setting to change its value from “true” to “false”. This will disable the use of the “Downloads” folder and allow you to choose where each download is saved.

And that’s it! These are seven of the best about:config tweaks for Firefox. Give them a try and see how they work for you.

Tweak #2: speeding up page loading

If you’re looking to speed up page loading in Firefox, there’s a about:config tweak for that. Just set the network.http.pipelining preference to true, and then set the network.http.pipelining.maxrequests preference to some number like 30. This will tell Firefox to open up multiple connections and send multiple requests at once, which can speed up page loading times.

Of course, your mileage may vary with this one, and some sites may actually load slower with this tweak enabled. But it’s definitely worth checking out if you’re looking for a way to speed up Firefox.

Tweak #3: improving privacy and security

One of the great things about Firefox is that it offers a high degree of control over how your personal data is used and shared. You can tweak the settings in about:config to improve your privacy and security while browsing the web.

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For example, you can disable third-party cookies, block referrer information from being shared with sites you visit, and disable web beacons. These tweaks will make it more difficult for companies to track your online activity and collect data about you.

If you’re concerned about online privacy and security, these about:config tweaks are a great way to help keep your data safe.

Tweak #4: making web browsing more efficient

We all know how frustrating it is to have a web page take forever to load. That’s why this next tweak is so important – it can help make your web browsing more efficient by speeding up page loading times.

To do this, we need to head into about:config and find the setting for “network.http.pipelining”. This setting controls how many requests can be made at once – the default is 4, but we can bump this up to 8 (or even 10 if you’re feeling daring).

Making this change can speed up page loading times, but it can also make your browsing less stable – so use it at your own risk. But if you’re looking for a way to make your web browsing a little bit faster, this is a great tweak to try.

Tweak #5: enabling advanced features

With about:config, you can enable a number of advanced features in Firefox that are not available in the standard settings. For example, you can enable the hidden “developer toolbar” by setting the “devtools.toolbar.enabled” preference to true. You can also adjust a number of low-level settings that can improve performance or change the way Firefox behaves.

One setting that you may find useful is “network.http.pipelining”, which can improve page loading times by sending multiple requests at once. To enable this setting, set the preference to true.

You can also change the way Firefox handles cookies. For example, you can set the “network.cookie.cookieBehavior” preference to “1” to disable third-party cookies.

These are just a few of the many advanced features that you can enable with about:config. For more information, see the Mozilla Developer Center article on about:config.

Conclusion

There are a lot of great about:config tweaks for Firefox that can help improve your browsing experience. Some of these tweaks can help improve performance, while others can help customize your browser to better suit your needs. Overall, these tweaks can help make Firefox a more powerful and efficient browser.

7 Great Firefox about:config Tweaks

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