Microsoft joins Interop 2025 along Apple, Google and Mozilla to improve the browser interoperability

Interoperability is very important for developers because this will ensure that their code will work seamlessly on all browsers and devices. In 2001, all the major browser makers agreed to work together for this in an event called Interop to smooth out the differences in many areas of their navigators.

Here’s how Microsoft describes this project in their latest Edge blog announcement:

The Interop project is a yearly effort where browser implementers survey developers about top pain-points and agree on areas where we will concentrate resources to drive to full interoperability.

So, basically, the browser makers look at the most important proposal changes from the developers and focus on them to improve or fix interoperabilities or shortcomings with their products.

If you’re curious, here is the list of areas that will get the browser creator’s focus this year, as laid out by Microsoft in the announcement:

• CSS anchor positioning, to place elements based on the position of other elements.
• View Transitions, to create animated visual transitions between different states of a document.
• Navigation API, to initiate, intercept, and modify browser navigation actions, making it easier for applications to manage user state changes.
• backdrop-filter, to apply graphical effects such as blurring or color shifting to the area behind an element.
• JSON module scripts, to make it easy to import JSON data in JavaScript modules.
• Core Web Vitals LCP and INP metrics, to measure the user experience quality of your site.
• Storage Access API, to help remove third-party cookies while still supporting user authentication flows.
• Layout, to continue improving the implementation quality of two fundamental primitives of the web: Grid and Flexbox.
• Pointer and mouse events
• Legacy mutation events removal
• @scope
• scrollend event
• text-decoration
• <details> element
• URLPattern
• WebAssembly
• Web Compat
• WebRTC

But that’s not all, you can also monitor one or more projects throughout the year in the Interop 2025 dashboard.

From last year, Edge also launched an extra dashboard with the top developer’s needs to track the improvements of their browser. Microsoft says that last year, they focused on scroll-driven animations and anchor positioning along with important progress on View Transitions.

The cooperation between the browser makers is not only beneficial for developers but also for us, the regular users. It would be nice to finally have all the web apps working seamlessly on all the browsers.

Are you excited about any of the projects? Let’s talk about this in the comments below.