Browser and Device Compatibility Over Time
A site that looked perfect at launch can start to show cracks as browsers update and new devices appear. Compatibility is not a fixed target — it moves, and maintenance keeps your site moving with it.
This article explains why ongoing checks matter and what we look for.
Which Browsers We Prioritise
We cannot test every possible combination of browser and device, so we focus on those your visitors actually use. Your own analytics tell us where to concentrate effort.
This keeps testing efficient and relevant — we spend time where it protects the most visitors, rather than chasing rare or obsolete setups.
- The browsers your analytics show as most used.
- The most common phone and tablet sizes.
- Recent operating system versions.
- A sensible tail of slightly older versions.
Why Things Drift
Browsers change how they render pages, new phone and tablet sizes arrive, and operating systems update. Each shift can subtly affect how your site appears.
What We Test
- Major browsers: Chrome, Safari, Firefox and Edge.
- Popular phone and tablet screen sizes.
- New operating system releases.
- Both the newest and a couple of older versions.
Fixing What We Find
When a compatibility issue appears, we reproduce it, identify the cause, and apply a fix that keeps your site looking right across the devices your visitors actually use.
If you need a hand with any of this, your Progressive Robot delivery team is ready to help. Raise a ticket from the Support area of your client portal or speak to your account manager and we will guide you through the next steps.