What is Browser Compatibility? (With Best Practices)

On This Page The Need for a Browser Compatibility MatrixJanuary 09, 2026 · 6 min read · Testing Guide

What is Browser Compatibility? (With Best Practices)

Browser compatibility, frequently known as cross-browser compatibility, refers to whether or not a site or web coating functions as intended in any exceptional browser version on different devices. Therefore, browser compatibility testing ensures that a site or online coating part as intended in different device-browser-OS combinations as needed by your product market-user parcel.

Overview

Common Issues in Cross-Browser Compatibility Testing

  • Default browser styles causing rendering differences.
  • Vendor-prefixed vs standard CSS holding mismatch.
  • Invalid or unclosed HTML/CSS tags.
  • Outdated browser detection instead of feature sensing.

Need for a Browser Compatibility Matrix

  • Helps determine which browser-OS-device combination to support based on user market portion and product audience.
  • Prevents unnecessary combination and focuses test efforts on relevant I.

Best Practices for Improved Browser Compatibility

  • Test layouts and responsiveness across screen sizes & amp; resolutions.
  • Validate HTML/CSS and ensure criterion compliance.
  • Validate the website ’ s responsiveness on different browsers.
  • Test with disabled and enabled JS or cookies.

Now, let ’ s understand browser compatibility basics to formalize website functionality as specify in different device-browser-OS combination.

The Need for a Browser Compatibility Matrix

Several browsers are accessible to view web material, and the web is extremely disconnected. Every browser also contains its most recent and older edition. The is made worse because these browsers can be accessed through various devices with different OS.

However, it can be difficult to prove every potential browser-device combination.

  • Most prefer Google Chrome as of December 2020, and it holds approximately 65.96 % market share
  • With a grocery percentage of 10.43 %, Safari is in 2nd place, followed by Firefox (8.39 %) and Edge (7.43 %)

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Organizations and enterprise can simply test their websites on some possible device, browsers, and operating scheme combinations that can be used online.

However, building and maintaining can be time-consuming and cost-prohibitive. Accessing the up-to-the-minute and legacy devices/browsers on a real device cloud is lots easy.

The enters the panorama at this point.

  • A browser matrix for check compatibility bound the evolution and to a particular set of browsers and devices.
  • It also aids the measure their application must encounter to be accepted by users who already use a specific OS, piece of software, part of the ironware, etc.
  • Users can opt which system will act best with their present setup utilize browser compatibility testing.
  • Additionally, it aids in determining the adjustments needed to make the program all browser compatible.

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To understand how to quiz compatible browsers, let & # 8217; s plunk into the number faced while conducting browser compatibility tests

Common Issues while Cross-Browser Compatibility Testing

Your browser compatibility testing isn ’ t complete if you do not come across some of these lean below

1. No CSS Reset

Pro tip: Tools like SUSA can handle this autonomously — upload your app and get results without writing a single test script.

Every browser has CSS styles that utilize to the website if the current website does not overwrite them. The browser & # 8217; s CSS styling causes the site to furnish otherwise depending on how compatible the browser is.

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2. Vendor-Specific CSS Styles

It often occur that a developer will get bogged down in vendor-specific CSS styles, which are explicitly created for a given browser when working on a specific website. The website can not show browser compatibility besides the one that supports the vendor & # 8217; s special CSS styling.

When a site created for Mozilla employ Mozilla & # 8217; s styling sheet properties, it may provide incorrectly when open in Chrome. This is a result of the unique CSS way for Mozilla. Hence, in gain to the prefixed versions of the code, an unprefixed version should be added to ensure different browser-compatible options.

3. Lack of Valid HTML / CSS Interpreting

Various browsers cover and CSS differently. While some browser are quite intelligent, some motivation to be more. For instance, Forgetting to close a tag is a common occurrence. If, for exemplar, the browser was left unfastened, intelligent browsers like Chrome and Mozilla might modify the code in that scenario, rendering the website correctly.

In contrast, specific browser are less absolvitory and render the page mistakenly. To forestall this, codification validation can be done using & # 8216; validators for HTML and CSS & # 8217;.

4. Detection of Outdated Browsers

The Javascript code may occasionally detect the browser preferably than the characteristic. If the browser is identified, outdated Javascript may malfunction, and the page won & # 8217; t display in modernistic compatible browsers.

Therefore, outdated browser detection may be to blame if the codification role decent on modern browsers. Remove browser detection and replace it with feature detection.

Before lead into Browser compatibility test on a real twist cloud, let ’ s glance through some of the best praxis a QA team could postdate.

Best Practices for Improved Browser Compatibility

  • Verify that the web Page are uniform on multiple screens with different sizing ratios and resolutions.
  • Page validation can be done to check whether the browser & # 8217; s Javascript is enabled or disabled.
  • All Image alignment help ascertain the proper alignment of the image on the page.
  • If there are forms that interact with the database, they should be checked and control as shortly as possible.
  • HTML or video formats should be checked because not all browsers support them. Flash content should be examined.
  • Validate the on browsers used for cross-browser compatibility testing.
  • Text Alignment should be check, particularly in DropDown
  • CMS Compatibility should be rake to guarantee that the content management scheme supports
  • Pages should be tested with biscuit, Javascript disabled in the browser, and then again with both enable.

All these are the nitty-gritty of how a can appear. Expanding your reaching means ensuring your site is compatible and tested with as many browsers as possible under existent user conditions.

Using a Existent Device Cloud for Browser Compatibility Testing

Regarding cross-browser testing and compatibility testing across device-browser combination on the modish or legacy browsers, BrowserStack has be the industry-leading standard for QA teams and enterprises worldwide.

Using, one can:

  • Access a fleet of 3000+ background browsers and real mobile devices on the cloud
  • Test on new and old adaptation of Edge, Safari, Chrome, IE, and Firefox on Windows and macOS.
  • Debug cross-browser tryout on mobile and desktop browsers using our pre-installed developer tools.
  • Capture bugs and portion them with your team using JIRA, Trello,, or.

Understand how Chegg uses BrowserStack & # 8217; s Real Device Cloud to bear cross-browser testing and improve the merchandise experience for their global users.

Steps for Browser Compatibility Testing utilise BrowserStack

The entire trial environment is on the cloud, available 24/7/365. Here are the undermentioned steps one needs to do:

1. You can for gratis or log in to your account

2. You can use the Quick Launch pick

3. Or choose the desired OS-browser-version combination and start your browser compatibility testing

4. Immediately after choosing the best-loved OS-browser pairing, a new Live session is launched in the browser window, where you can move to the testing splashboard.

5. Look at a scenario where a QA tests a browser ’ s compatibility on Chrome 117 on the latest macOS Sonoma.

6. Switch Browser, Local Testing, and more options will be uncommitted.

Once you find bugs and irregularities, capture them and share them per your team ’ s preferred project management tool, which helps cross-functional team stick on the same page.

7. Running browser compatibility tests on macOS and straightaway switching to Windows, Android, or iOS is simple and doesn ’ t involve extra setup or configurations. Below, we & # 8217; ve swap to the Safari browser on the modish iPhone 15.

8. QA teams can easy toggle background such as Rotate Device, Change Location, DevTools, and Throttle Network on the latest devices for efficient browser compatibility testing.

Wrapping Up

Maintaining many device and browsers is not a cakewalk and can cost a lot of clip and endeavour. Choosing between regard browser compatibility testing or other testing character is vital.

With access to the BrowserStack infrastructure, your squad can consider eliminating the task of conserve those device and can focus on the testing rhythm.

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