I’ve been working on browsers professionally for 12 of the last 15 years, and in related areas for 20 of the last 20, and over the years I’ve discovered enough surprises in browser behavior that they’re no longer very surprising. Back in April, I wrote up a quick post explaining how easy it is toContinue reading “Surprise: Undead Session Cookies”
Tag Archives: interop
Edge79+ vs. Edge18 (Edge Legacy) vs. Chrome vs. Internet Explorer
Note: I expect to update this post over time. Last update: Sept 29, 2025. Compatibility Deltas As our new Edge Insider builds roll out to the public, we’re starting to triage reports of compatibility issues where Edge79+ (the new Chromium-based Edge, aka Anaheim) behaves differently than the old Edge (Edge18, aka Spartan, aka Edge Legacy)Continue reading “Edge79+ vs. Edge18 (Edge Legacy) vs. Chrome vs. Internet Explorer”
Private Browsing Mode
Note: This blog post was originally written before the new Chromium-based Microsoft Edge was announced. As a consequence, it includes discussion of the behavior of the Legacy Microsoft Edge browser. The new Chromium-based Edge behaves largely the same way as Google Chrome. Last Update: 13 June 2025 InPrivate Mode was introduced in Internet Explorer 8Continue reading “Private Browsing Mode”
Cookie Limits
I’ve been writing about Cookies a lot recently, and also did so almost a decade ago. Edge/IE cookie limits The June 1018 Cumulative Updates increased the per-domain cookie limit from 50 to 180 for IE and Edge Legacy across Windows 7, Windows 8.1, and Windows 10 (TH1 to RS2). This higher limit matches Chrome’s cookie jar. InContinue reading “Cookie Limits”
Edge Interop Issues
As we finish up the next release of Windows 10 (Fall 2018), my team is hard at work triaging incoming bugs. Many such bugs take the form “Edge does the wrong thing for this page. ${Other_Browser} works okay.” This post is designed to be an (ever-growing) index of some of the behavioral deltas that areContinue reading “Edge Interop Issues”
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