Guidelines

Browser support

Users have access to hundreds of versions of browsers, so instead of assessing them all individually we've come up with a rating system which defines different levels of browser support and the testing requirements for each level. We've assigned the highest ratings to the browsers that are most commonly used by our customers.

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Priority definitions

Priority level A = Fully supported

• Testing is required
• All content must be available
• Layout must comply with the design, unless technical needs prevent this
• All functionality must be available and work as required

Priority level B = Mostly supported

• Testing is required
• User should be able to place an order or carry out the main function of the page
• Layout doesn't have to be identical to the design, but should retain its functionality

Priority level C = Not supported

• Testing is not required

A good example of this would be users browsing using Opera. The reason we don't "Fully Support" this browser is simply down to user metrics, not the quality of the browser. We'd actually expect most functionality to work with no real issues, although we don't officially test in this browser.

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Browsers and their ratings

Desktop

Browser	Grading
Chrome, last 3 versions (MacOS & Windows)	A
Edge, last 3 versions (Windows)	A
Firefox, last 3 versions (MacOS & Windows)	A
Safari (MacOS), last 3 versions	A
All other browsers & versions	C

Mobile

Browser	Grading
Safari (iPhone), last 3 versions	A
Safari (iPad), last 3 versions	A
Chrome (Mobile), last 3 versions	A
Samsung Internet, last 3 versions	B
All other browsers & versions	C

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Devices

To give an idea as to what devices are worth testing on, these are the current recommended device types based on our analytics.

Device	Models
iPhone	Xs to latest (all variants such as SE Gen 2, Pro and Mini)
iPad / iPad mini	iPad Air (Gen 3) to latest (all variants such as Mini & Pro)
Samsung Galaxy	S21 FE to latest
Samsung Galaxy Tab	S8 to latest
Google Pixel	5a, 7