Cross-browser Compatibility
Cross-browser compatibility is the ability of a web application to function correctly across different web browsers and browser versions.
“The degree to which a website or web application can function across different browsers and degrade gracefully when browser features are absent or lacking.”
(Definition reproduced from the ISTQB Glossary. Copyright belongs to ISTQB.)
View the complete ISTQB GlossaryWhat is Cross-browser Compatibility?
Cross-browser compatibility ensures that users experience consistent functionality, layout, and performance regardless of the browser they use.
Browser differences: Browsers may interpret HTML, CSS, and JavaScript differently.
Testing focus: Verify supported browsers display and behave as expected.
User experience: Consistent behavior improves accessibility and customer satisfaction.
Real World Example
A regulated product team is preparing a release where Cross-browser compatibility appears in reviews, test design conversations, or defect triage rather than as an isolated glossary word.
The risk is that the team treats Cross-browser compatibility as interchangeable with nearby ISTQB terms. That makes test scope blurry and can lead to weak evidence for the release decision.
The tester anchors the discussion in the official definition, asks where the concept appears in the product, and designs examples that show the difference between Cross-browser compatibility and similar ideas.
The page becomes useful in practice because Cross-browser compatibility is connected to a specific testing decision, not memorized as a detached definition.
Practice Questions
Question 1
Which statement BEST describes Cross-browser compatibility in the context of ISTQB terminology?
Question 2
A tester needs to explain Cross-browser compatibility to a non‑technical stakeholder. Which approach is MOST appropriate?
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