Linux Tactic

Installing Firefox on Linux Mint 21: An Essential Tool for Software Testers

Firefox has become an integral part of the modern digital landscape and a favorite among software testers. It has gained popularity because of its functionality, security, and support for various platforms.

In this article, we will explore how to install Firefox on Linux Mint 21 and why it is so vital for software testers.

Checking Firefox Version

Before installing Firefox, we need to check the version of our current Firefox browser. Whether you are using the latest or an older version of Firefox, its essential to keep track of the version to ensure compatibility with other applications.

To check your current Firefox version, simply open Firefox, click on the Help option on the top menu, and select About Firefox. The version number will be displayed on the screen.

Its crucial to note that Firefox releases periodic updates to improve performance and security.

Downloading Older Versions of Firefox

Sometimes, as software testers, we need to assess an applications compatibility with various browser versions. Firefox has an extensive library of older versions that we can download from the official Mozilla Firefox website.

To download an older version, navigate to the Firefox version archive site, select the desired version, click on the download link, and save the file in an easily accessible location.

Extracting Downloaded File

Once youve downloaded the Firefox file, you need to extract it from the downloaded ZIP archive before proceeding. To do so, navigate to the Downloads folder, right-click on the Firefox ZIP file, and select the Extract Here option.

The extraction process will take a few seconds, and the extracted files will be saved to the same folder.

Removing Previous File and Installing Latest File

To install Firefox on Linux Mint 21, we need to first remove any previous installations of Firefox. To remove the Firefox application along with its configuration files, run the following command in the Linux terminal:

`sudo apt-get remove –purge firefox firefox-esr`

This command will remove all traces of the Firefox installation from the system.

Next, we need to install the latest version of Firefox. To install Firefox on Linux Mint 21, we need to run the following command in the terminal:

`sudo apt-get install firefox`

This command will automatically download and install the latest version of Firefox on your Linux Mint 21 system.

Launching Firefox

To launch Firefox, simply click on the Firefox icon in the applications menu, or type firefox in the Linux terminal.

Importance of Firefox for Software Testers

Firefox is an essential tool for software testers. It allows us to test web applications and determine their compatibility with different operating systems, browser versions, and plugins.

As a web app tester, Firefoxs powerful developer tools enable the identification and resolution of any issues that may arise. Firefox comes with a range of add-ons that testers can use to improve their testing process.

For instance, the Web Developer extension offers a wide range of tools, such as validation and error detection, that can be incredibly useful for debugging web applications. Firefox also supports a vast range of operating systems and platforms, making it an essential tool in software testing.

It is available on Windows, Mac, and Linux, and we can run different versions of Firefox on the same system simultaneously, allowing us to compare tests between versions quickly. Furthermore, Firefox has an excellent selection of pre-built user agent switchers.

User agents allow us to send a specific browser identification to a web application. This feature enables testers to check how the web app or website will react to different browsers and versions.


In conclusion, Firefox is a popular browser among software testers because of its functionality, security, and support for different platforms. By following this simple guide, you can easily install Firefox on your Linux Mint 21 system and take advantage of its powerful capabilities.

Firefox is an indispensable tool for software testers in their pursuit of high-quality web applications. Firefox is a free and open-source software that has become one of the most popular web browsers in recent years.

Since it was first introduced to the market, Firefox has been a favored option for users who value their privacy, security, and customization options. Lets take a closer look at some of the indispensable features that have helped to make Firefox such a highly-regarded browser.

Free and Open-Source

Firefox is available to all at no cost, as it is a free and open-source web browser. It is built and maintained by Mozilla, an open-source community of developers and contributors who ensure that the software remains transparent and free.

Being open-source means that Firefoxs source code is freely available to the public, and anyone can view, modify, and distribute it. This openness helps to ensure that the software remains secure, efficient, and relevant to modern users.

Default Search Engine Being Google

Like most web browsers, Firefox has a default search engine, which is the search engine that the browser uses when a user enters a search query in the address bar or search bar. Firefoxs default search engine is Google.

This partnership between Mozilla and Google has been a long-standing one, and it enables users to enjoy the benefits of Googles vast search engine capabilities. However, Firefox users are not limited to using Google as their default search engine.

The browser offers a range of other search engines, such as Bing, Yahoo, and DuckDuckGo.

Additional Features Offered by Firefox

Apart from its free and open-source nature and its default search engine of Google, Firefox is a highly versatile and customizable browser. Some of the features that make it stand out from its competitors include:


Privacy and Security Features

Firefox has a range of features that enhance the privacy and security of its users. It comes with a built-in protection mechanism known as Enhanced Tracking Protection (ETP), which blocks cookies and trackers from following your online activities.

It also warns you when visiting suspected malicious websites and prevents ads from following you during online sessions. 2.

Customization Features

Customization is a significant advantage of using Firefox. It allows users to tailor the browser to suit their preferences through its range of add-ons and themes.

The add-ons allow you to add new functionalities to the browser while the themes enable users to customize the browsers look and feel. 3.

Cross-Platform Functionality

Firefox is a cross-platform browser, meaning it is available on different operating systems, including Windows, Linux, and Mac. This functionality allows users to switch seamlessly between different platforms while maintaining their bookmarks, preferences, and browser history.

4. Accessibility Features

Firefox offers a range of accessibility features ensuring that all users can enjoy a robust browsing experience.

These features include zooming, screen readers, high contrast mode, and customizable fonts. 5.

Developer Tools

Firefox also provides a high-quality developer tools suite for developers to test web applications and improve website functionality. The Developer Edition of Firefox comes with additional features such as Javascript Debugger, Style Editor, and Network Monitor, making it ideal for debugging and profiling complex web applications.


Firefox has continued to be a prominent web browser choice for many users mostly because of its versatility with its free and open-source nature, its default search engine being Google, it features a privacy and security, customization and cross-platform features, and developer tools. As the Internet landscape becomes more complex, Firefox continues to upgrade and improve its capabilities, thus enabling it to remain among the most powerful and versatile web browsers available.

In summary, Firefox is a popular and versatile web browser that boasts numerous features, making it perfect for software testers and everyday users alike. Some of its essential features include being free and open-source, its default search engine being Google, offering a range of customization options, privacy and security features, and cross-platform functionality.

With Firefox continually improving its capabilities, it remains among the most powerful and versatile web browsers available. Users should take full advantage of its unique features to enhance their browsing experience and maximize productivity online.

Popular Posts