Browser Compatibility: Why Your Website Must Work Everywhere
Last updated: March 2026 · Reading time: 4 minutes
Browser compatibility describes a browser's ability to display web content as intended by the developers. The problem has existed since the early 1990s, when browsers only rudimentarily followed standards. Even current browsers differ in details of HTML, CSS, and JavaScript interpretation.
Why Browser Compatibility Is Business-Critical
Your users use Chrome, Safari, Firefox, Edge, and mobile browsers in different versions. If your website does not work in one of these browsers, you lose visitors and potential customers.
The approach of using only standards-compliant features that all relevant browsers understand equally is the most reliable strategy. In Drupal projects, we rely on progressive enhancement: core functionality works everywhere, advanced features are added for modern browsers.
Cross-Browser Testing in Drupal Projects
Drupal outputs standards-compliant HTML. This is an advantage over systems that produce proprietary markup. Still, every project needs systematic testing: automated tests with tools like BrowserStack or Playwright, manual checking on real devices, and continuous monitoring after launch.
arocom defines a browser matrix with the client at the start of each project. This clarifies which browsers in which versions are supported — and which are not.
Does Your Website Work Everywhere?
The Future Check tests your website for browser compatibility, performance, and accessibility.
Which browsers must a website support?
That depends on your audience. Typically, Chrome, Safari, Firefox, and Edge in their last two versions are relevant. arocom defines the browser matrix at the start of each project together with you.
Is Drupal browser-compatible?
Drupal produces standards-compliant HTML and CSS. The risk for compatibility issues lies in the custom theme and JavaScript extensions. Systematic testing is therefore mandatory.
Read more
- W3C standards explained — Standards-compliant code
- Semantic HTML — The foundation for compatibility
- Future Check (Audit) — Independent analysis
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