21 Hidden Firefox Features And Settings You Should Start Using Today 2021

Hidden Firefox Features And Settings
Hi, in this article we have shared the list of hidden firefox features and settings that you can change to customize the firefox as per your requirements. 

These settings are hidden in the firefox and normal users have no idea about their use but we have explained the use of each hidden firefox feature.

1. Configure Firefox Settings

Configure Firefox Settings
This hidden firefox setting can be is greater use if used correctly. 

You can get access to the interface to the many boolean, integer, and string variables that control every aspect of Firefox's behavior by using this setting. 

To use this setting, type "about: config" without quotes in the address bar.

After this, you can change the configuration of the firefox by double-clicking on any option as per your choice. Use these settings carefully as this can affect the performance of firefox.

2. Move Scroll Bar To Left 

Move Scroll Bar To Left Firefox Feature
You can use this hidden setting to move the slider from the right to the left side of the screen. 

This hidden firefox feature can help many of us especially those who are a leftie. 

To move the slide bar to the side side of the browsers go to about:config and then Search for "layout.scrollbar.side"

After this double click on the option and then change the 0 to 3. This will change the position of the slider and you have to refresh the page to see the replacement in the position.

3. Show Tabs Below Titlebar

Show Tabs Below Titlebar
After enabling this hidden firefox feature you will see the Title bar at the top of the screen and the tabs will be placed below the title bar as you can see in the picture above. 

If you like this appearance then you can enable this by navigating to about:config and then Search for "browser.tabs.drawInTitlebar". After this Double click on the option to change its value to false.

4. Master Password

Master Password Hidden Firefox Feature
This is the one password that you can use to see your user's name password. You need this master password so that you can access all you currently save passwords in the firefox. 

If you have not created any master password then you can easily create one by going the Menu () > Options > Privacy and Security (or type in about:preferences#privacy).

After this, you have to check the box next to "Use a master password." and then follow the directions in the pop-up window. 

You can disable or change your master password through this same window.

If you forgot your master password then you can rest your current master password by typing "chrome://pippki/content/resetpassword.xul" in the address and then enter

If you will reset your master password then all your stored web and email password, users' names, personal certificates, and private key will be forgotten so users this hidden firefox feature when necessary.

5. Keyboard Shortcuts For Firefox

Keyboard Shortcuts For Firefox
There are many useful keywords that you can use on firefox, these keyword shortcuts can make your day to commands on firefox supper easy. We have listed all our favorite shortcuts below.
  • Back Alt + ← Backspace,
  • Forward Alt + → Shift + Backspace,
  • Home Alt + Home,
  • Open File Ctrl + O Reload F5 Ctrl + R,
  • Stop Esc,
  • Focus Next Link or Input Field Tab,
  • Focus Previous Link or Input Field Shift + Tab,
  • Go Down a Screen Page Down Space bar,
  • Go Up a Screen Page Up Shift + Space bar.
Try to use these keyboard shortcuts and share your experience with us in the comments.

6. Zoom In/Out

Zoom In/Out Hidden Firefox Feature
You can use this hidden firefox feature to change the size of elements and the size of a webpage. You can use this feature to zoom in the pages or zoom out the pages. 

This will be of great use to make the text of a website larger in size on the website with tiny texts. 

You can also use this feature to increase the size of images on a website. You can press Ctrl and the Plus button to zoom on the webpage. Press Ctrl and minus button to Zoom out the webpage.

You can keep on pressing the plus button to continuously increase the size of the webpage and the minus button to decrease the size of the webpage. 

You can do the same by navigating to Option in the top right corner and then Zoom. 

From here you can make the browser work in fullscreen. You can make the firefox to come to bake to its original size by pressing the f11 button.

7. Incognito Mode

Incognito Mode In Firefox
You can use the incognito feature to browse privately on the firefox browser. 

If you surf the internet in incognito mode then the information related to the site you have visited, username, passwords, cookies, and other information will not be saved in the browser.

Just because you’re using private browsing mode doesn’t mean you’re up to something nefarious. Perhaps you want to keep your work and personal life separate. 

You might share a computer or device and you don’t want your siblings snooping. You could be shopping for a gift and you don’t want anything to spoil the surprise. 

Or maybe you just want to limit the amount of data companies collect about you and you value privacy. Incognito or private browsing mode is made for any of these scenarios.

Firefox clears your search and browsing history when you quit the app or close all Private Browsing tabs and windows. 

While this doesn’t make you anonymous to websites or your internet service provider, it makes it easier to keep what you do online private from anyone else who uses this computer.

Private Browsing doesn't make you anonymous on the Internet. Your Internet service provider, employer, or the sites themselves can still gather information about pages you visit. 

Private Browsing also doesn't protect you from keyloggers or spyware that may be installed on your computer. You can use the VPN to protect your privacy on the internet.

8. Block Auto-Refresh

Block Auto-Refresh Feature In Firefox
Web pages (and web servers) can ask a browser to automatically refresh a page after a given timeout by including the HTML element or by sending a Refresh: HTTP header. 

This can be helpful (as in the case of a webpage whose content is updated constantly) but it also can be irritating. 

Automatic refreshes also have accessibility implications; sudden replacement of content can be disorienting.

The UAAG recommends giving users the option to disable/ignore automatic page refreshes for this reason. 

This preference allows users to block automatic page refreshing, instead of displaying a message allowing them to manually refresh the page

You can stop the pages from auto-refreshing in the firefox browser by typing "about config" (without the quotes) in the address bar and then search for "accessibility.blockautorefresh". Now double click on the option to make it false.

9. Prevent Videos From Autoplaying

Prevent Videos From Autoplaying
Sometimes you have must have seen that some website starts playing the video without your permission. 

Something this because very annoying, use too much data and make the internet slower. You can use the anti autoplay media setting in firefox to stop the autoplay videos and audios on the websites. 

To always allow or disallow autoplay for all media with audio or video:
  1. Click the menu button and choose Options.
  2. Select the Privacy and Security panel. 
  3. Scroll down to the Permissions section. 
  4. Find Autoplay and click the Settings button. 
  5. Use the Default for all websites drop-down menu to select how you want Firefox to handle media autoplay for all websites: 
  6. The default Block Audio setting will prevent autoplay for all media with sound. The Block Audio and Video setting will prevent autoplay for all media, including video, even though the audio is muted. The Allow Audio and Video setting will allow all media to autoplay. 
  7. After you have made your selection, click Save Changes.
When Firefox is actively blocking media on a website, you'll see a special no media icon in the address bar. 

Click the Site Info button in the address bar to open the Control Center, where you can change the Autoplay setting. This option will always appear in the Control Center.

10. Inspect

Inspect Hidden FireFox Feature
You can use it to view and edit page content and layout. Visualize many aspects of the page including the box model, animations, and grid layouts. 

You have to right-click on an element on the webpage to see the code of that element. You can see the code and also make some changes to that code.

With X-Ray Goggles activated, you'll notice that as you hover your mouse, sections of the web page become highlighted with a brightly colored box. 

These boxes represent the elements of the web page. Click on one and you'll enter the code editor, where you can remix the element with your own variation.

11. Print

Print Hidden Firefox Feature
Firefox for Android lets you print web pages to Google Cloud Print. 

Firefox will remove extra clutter like background images menus to give you a clean, print-friendly page.
  • Open the page you want to print in Firefox for Android. 
  • Tap the menu button (either below the screen on some devices or at the top-right corner of the browser). 
  • Tap Page. 
  • Tap Print. 
  • Choose Google Cloud Print from the drop-down at the top of the screen.
Google Cloud Print connects your printers to the Web, allowing you to print from Firefox on any Internet-enabled Android device.

12. Take Screenshots

Take Screenshots In Firefox
Firefox ScreenshotGo lets you take and organize screenshots easily on your Android phone. 

Take screenshots with one tap and instantly sort or organize them into collections. 

To take a screenshot of a webpage right click on the webpage and then click on the "Take a screenshot" in the popup window at the bottom.

Simply tap the screenshot button screenshot go button at the edge of your screen for each screenshot you want to take. After taking a screenshot, you can add that screenshot to a collection.

When you open Firefox ScreenshotGo, you can scroll through your five most recent screenshots in the Quick access section, or view them in each collection.

In a new or existing screenshot, tap the text scanner button Screenshotgo Text Scanner Button to extract text from the screenshot. 

You can then long-tap on the text to copy it and then long-tap in the address bar of your web browser to paste it and search the Web for that text.

13. Site Info Settings

Site Info Settings In FireFox
By using this feature you can see whether a website is safe to visit, you can check for security info about the site. Chrome will alert you if you can’t visit the site safely or privately. If you see a full-page error message saying "Your connection is not private," then there's a problem with the site, the network, or your device.

You can click on the lock icon on the left side of the address bar to see the full site information. From here you can check whether the site you are using is secure or insecure. By using this feature you can see the cookies and tracking tool that a website uses to collect information about when you are using the website. You can see all the content that is blocked from that website by firefox. You can use this hidden firefox feature to enable the elements that are blocked by the firefox to improve your experience on that website.

14. Search From Text

Search From Text
You can use this trick to select any text from a web page and then directly search that word on Google without typing it in the search bar. You can do this by selecting a word and then right-clicking on the select. After then select the "Search Google for the word". By doing this you will be able to get the search for that word on Google in the new tab.

15. Change Search Engine Setting

Change Search Engine Setting In FireFox
Firefox comes with several available search engines by default. Many websites offer search engines that you can add to Firefox. 

This allows you to search with that website's search engine, directly from your Firefox address bar or search bar. This article explains how to add or remove the search engines that Firefox uses.

You can change the default search engine to your favorite one by navigation to Options > Settings > Search  > Default search engine > Choose the default search engine to use in the address bar and search bar.

To add search engine discovery to the address bar: Right-click the Page Actions Add Search Engine menu item that indicates an available search engine (as shown above for YouTube) and selects "Add to Address Bar". 

A search engine icon will be added to the address bar. When you visit a different site that offers a search engine (such as www.yahoo.com) then an icon for that site will appear in the address bar.

If you remove a search engine that you added yourself and you change your mind, you'll have to add it back again, either from the Search bar or address bar by visiting the website or by reinstalling the Search engine add-on (see above). 

If you remove any of the default search engines that are built into Firefox, you'll have to go to your Firefox Options Search panel and click the Restore Default Search Engines button in the One-click search engines section to bring them back.

16. Change Themes

Change Themes Feature In Firefox
A theme is a type of Firefox add-on which changes the visual appearance of Firefox. This article describes how to find, install, and manage themes in Firefox. 

A theme changes the appearance of Firefox, such as the color scheme and background image of the toolbars.

To apply a theme in the firefox you have to go to Settings and then Themes (at the bottom).

If you have a problem with Firefox, it may be caused by your theme or your theme's interaction with other add-ons. 

For troubleshooting instructions, see Troubleshoot extensions, themes, and hardware acceleration issues to solve common Firefox problems. 

If you cannot install a theme, see Unable to install add-ons (extensions or themes) or you can tell us in the comments.

17. Customize Homepage

Customize Homepage
By default, there are many shortcuts create on the home page based on the website you visit. You can add or remove the websites from the home page as per your requirements. By this, you can create shortcuts to the webpage and easily access them by using the shortcuts.

You can add or remove the shortcuts by hovering over the shortcut and then click on the options at the top right side. Now change the settings of that shortcut as per your wish.

18. Do Not Track Setting

Do Not Track Feature Setting In Firefox
Firefox lets you tell websites that you do not want them to track your browsing behavior. Most major websites track their visitors' behavior and then sell or provide that information to other companies. 

This information can be used to show ads, products, or services specifically targeted to you. 

Firefox has a Do Not Track feature that lets you tell every website you visit, their advertisers, and content providers that you don't want your browsing behavior tracked.

The Do Not Track feature is turned off by default except in Private Browsing, where it is always on by default. To always use Do Not Track:
  1. Click the menu button menu and select Content Blocking. 
  2. Under Send websites a "Do Not Track" signal that you don't want to be tracked, choose Always. Close the about: preferences page. Any changes you've made will automatically be saved.
Honoring this setting is voluntary individual websites are not required to respect it. 

Websites that do honor this setting should automatically stop tracking your behavior without any further action from you. 

Turning on this hidden firefox feature will not affect your ability to log in to websites nor cause Firefox to forget your private information, such as the contents of shopping carts, location information, or login information.

19. Set A Default Home Page

Set A Default Home Page
You can use this firefox setting to change the home page. This means you can replace the default home page with any new home page. 

You have to just click on the settings icon at the top left of the home page > New Windows and Tabs and then New Windows and Tabs. Now, you can enter a URL and make it a default home. 

By using this setting you can relace the Gooogle with any other search engine or a website of your choice. You can even set the home page as a blank. As you can see in the image we have replaced the default home page with bing.com.

20. Accelerate Performance

Accelerate Performance Hidden FireFox Feature
Firefox automatically uses settings that work best with your computer. 

You can modify these settings on your Firefox Options page. Click the menu button and select Options. In the General panel, go down to the Performance section and uncheck the box next to Use recommended performance settings. You will then be able to change the following settings: 

Use hardware acceleration when available: This setting allows Firefox to use your computer's graphics processor, if possible, instead of the main processor, to display graphics-heavy web content such as videos or games. 

This frees up resources on your computer so it can run other applications, like Firefox, faster. This box is checked by default but the feature isn't available for all graphics processors. You must restart Firefox after changing this setting before it will take effect.

Content process limit: With Multiprocess Firefox, also called electrolysis or e10s, Firefox runs web content for all tabs separately from the main Firefox process for increased security and performance. 

Using multiple content processes can further increase performance and minimize the impact of content process crashes. You can modify this setting to increase or decrease the content process limit settings-Performance.

You can set between one and eight content processes. The default is eight. Having more content processes can improve performance when using multiple tabs but it will also use more memory.

21. Fonts and Colors Settings

Fonts and Colors Settings In FireFox
You can use this setting to make the change in the appearance in the text and the text font and size. 

You can use this setting to increase or decrease the size of the text and the font as per your requirements. 

To apply these changes navigate to Settings > General > Language and Appearance and then Fonts and Colors. 

So, these were the hidden firefox features, tips, and tricks. We have tried to tell you about each hidden feature in detail but if you are facing any problem then you can tell in the comments and share any other feature you know with us.

Related Video


  1. Which is you favorite hidden Firefox features, tips and tricks. Share any other feature that about the Mozilla Firefox that we have not mentioned in this article.

  2. These hidden Firefox feature and setting are the best that i have ever read. Thanks

  3. Apply new themes to Firefox is the best feature.

    1. You can choose from many beautiful themes and make your brewers look great!


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