Browser support table – for responsive websites


The following document is a modification of a browser support standards document created by BBC. The document was outdated and did not cover mobile browsers so I did some modifications and simplifications. The document is meant as a guide for Responsive Web Design projects and will give developers and clients a hint of what browser support they can expect and will give the development team guidance on how they need to focus their testing. It is not meant as a contract between the development team and the client. It is important that the development team use web standards, and browsers that are not mentioned on this list (such as TV browsers, game consoles, fridge browsers and smart watches) will probably work well, but they will not be actively tested by the development team.

1. Introduction

1.1. Scope of this Document

1.1.1. This standard applies to web browsers that are being used on desktop versions of Windows, Mac OS and Linux/Unix and mobil browsers that are being used on iOS, Android and Windows Phone.

1.2. Web Browser Support

1.2.1. The project members accept that the nature of the web medium is such that web pages cannot be produced in such a way as to be uniformly rendered in all browsers, so as to provide a consistent experience for all users. We accept that small variations in this experience are acceptable within the ‘Levels of Support’.

1.2.2. Web browsers are assigned a ‘Level of Support’ by the project members. These levels of support are summarised in the Browser Support Table.

1.2.3. There’s nothing wrong with using all the latest bells and whistles to support funky features of newer browsers, but we try to do it in a way that still allows users not supporting (or intentionally disabling) these features to access your basic content.

2. ‘Levels of Support’ definitions

2.1. Support Level 1 – supported web browser – Support definition

2.1.1. All content MUST be readable and usable and all functionality MUST work.

2.1.2. Variations to presentation of content MUST be minimised.

2.1.3. Where CSS layout is used, the CSS MUST be rendered by supported web browsers, so that a fully-styled version of the page is presented to the user.

2.1.4. Pages SHOULD be developed to maximise the user experience for users of the web browser with the highest proportion of users.

2.2. Support Level 2 – partially-supported web browser – Support definition:

2.2.1. All core content MUST be readable and usable and navigation MUST work.

2.2.2. Any degradation to (client-side) application functionality MUST be graceful degradation.

2.2.3. Any degradation to presentation MUST NOT obscure content.

2.2.4. Where CSS layout is used, you MAY choose to provide an unstyled version of the page to partially-supported browser.

2.3. Support Level 3 – unsupported web browser – Support definition:

2.3.1. No support or testing necessary.

2.3.2. Any web browsers not specifically listed in the support table MAY also be regarded as level 3; that is, unsupported.

3. Support table

3.1. The table below defines the levels of support that MUST be adhered to.

Browser Version Platform Level
IE 8, 9, 10 Windows 1
IE 7 Windows 2
IE WP 8 WP 8 1
IE WP 7.5 WP 7.5 2
Firefox latest All 1
Chrome latest Windows & Mac 1
Opera latest All 2
Safari 5, 6 Mac 1
Safari iOS 6, iOS 7 iOS 1
Safari iOS 5 iOS 2
AndroidBrowser Android 4.1+ Android 1
AndroidBrowser Android 2.3Android 4.0 Android 2
Chrome latest iOS & Android 1


Browser Versions

Pre v1.0, Alpha, Beta and Release Candidate builds are not supported.

Browser Abbreviations

FF = Mozilla Firefox, IE = Microsoft Internet Explorer, WP = Windows Phone

Published by

Anders M. Andersen

Digital Project Manager and Front End Developer.