This issue report complains that Edge doesn’t stream AAC files and instead tries to download them. It notes that, in contrast, URLs that point to MP3s result in a simple audio player loading inside the browser. Edge has always supported AAC so what’s going on? The issue here isn’t about AAC, per-se; it’s instead about whether or notContinue reading “Streaming Audio in Edge”
Author Archives: ericlaw
ShellExecute Doesn’t
My oldest supported Windows application is a launcher app named SlickRun, and it’s ~24 years old this year. I haven’t done much to maintain it over the last few years, although it’s now available in 64-bit and runs great on Windows 10. (Thanks go to Embarcadero, who now offer a free “Community” edition of Delphi, theContinue reading “ShellExecute Doesn’t”
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”
Cookie Controls, Revisited
Update: The October 2018 Cumulative Security Update (KB4462919) brings the RS5 Cookie Control changes described below to Windows 10 RS2, RS3, and RS4. Note: Most of the content about “Edge” in this post describes Edge Legacy– modern Edge is based on Chromium and behaves mostly like Chrome. See more discussion of 3P cookies in 2022’s NewContinue reading “Cookie Controls, Revisited”
Firefox and Fiddler – Easier than Ever
In a world where software and systems seem to march inexorably toward complexity, I love it when things get simpler. Years ago, Firefox required non-obvious configuration changes to even send traffic to Fiddler. Eventually, Mozilla changed their default behavior on Windows to adopt the system’s proxy, meaning that Firefox would automatically use Fiddler when it was attached,Continue reading “Firefox and Fiddler – Easier than Ever”
Chrome Sync
Disclaimer: Hi. I’m an engineer on the Edge browser now, but worked on Chrome Security for a bit over two years. I speak for no one but myself, and I share no internal or confidential information in this post. Update: The Chrome team announced upcoming changes based on user-feedback. This weekend, there were a bunchContinue reading “Chrome Sync”
Cookies and Concurrency, Redux
Note: This post concerns Edge Legacy (aka Spartan) and does not apply to the modern Chromium-based Edge. In yesterday’s episode, I shared the root cause of a bug that can cause document.cookie to incorrectly return an empty string if the cookie is over 1kb and the cookie grows in the middle of a DOM document.cookieContinue reading “Cookies and Concurrency, Redux”
ERROR_INSUFFICIENT_BUFFER and Concurrency
Many classic Windows APIs accept a pointer to a byte buffer and a pointer to an integer indicating the size of the buffer. If the buffer is large enough to hold the data returned from the API, the buffer is filled and the API returns S_OK. If the buffer supplied is not large enough toContinue reading “ERROR_INSUFFICIENT_BUFFER and Concurrency”
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”
Script-Generated Download Files
As we finish up the next release of Windows 10, my team is hard at work triaging incoming bugs. Here’s a pattern that has come up a few times this month: Bug: I click download in Edge Legacy: …but I end up on an error page: Womp womp. If you watch the network traffic, you’llContinue reading “Script-Generated Download Files”
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