Fiddler in 2025
The Fiddler Web Debugger is now old enough to drink, but I still use it pretty much every day. Fiddler hasn’t aged entirely gracefully as platforms and standards have changed over the decades, but the...
View ArticleUnderstanding SmartScreen and Network Protection
The vast majority of cyberthreats arrive via one of two related sources: That means that by combining network-level sensors and throttles with threat intelligence (about attacker sites), security...
View ArticleFiddler – My Mistakes
On a flight back from Redmond last week, I finally read Linus Torvalds’ 2002 memoir “Just For Fun.” I really enjoyed its picture of Linux (and Torvalds) early in its success, with different chapters...
View ArticleCapturing Logs for Debugging SmartScreen
The Microsoft Edge browser makes use of a service called Microsoft Defender SmartScreen to help protect users from phishing websites and malicious downloads. The SmartScreen service integrates with a...
View ArticleEdge’s Super-Res Image Enhancement
One interesting feature that the Edge team is experimenting with this summer is called “SuperRes” or “Enhance Images.” This feature allows Microsoft Edge to use a Microsoft-built AI/ML service to...
View ArticleExtending Fiddler’s ImageView
Fiddler’s ImageView Inspector offers a lot of powerful functionality for inspecting images and discovering ways to shrink an image’s byte-weight without impacting its quality. Less well-known is the...
View ArticleFiddler And LINQ
Since moving to Google at the beginning of 2016, I’ve gained some perspective about my work on Fiddler over the prior 12+ years. Mostly, I’m happy about what I accomplished, although I’m a bit awed...
View ArticleFiddler in 2025
The Fiddler Web Debugger is now old enough to drink, but I still use it pretty much every day. Fiddler hasn’t aged entirely gracefully as platforms and standards have changed over the decades, but the...
View ArticleUnderstanding SmartScreen and Network Protection
The vast majority of cyberthreats arrive via one of two related sources: That means that by combining network-level sensors and throttles with threat intelligence (about attacker sites), security...
View ArticleFiddler – My Mistakes
On a flight back from Redmond last week, I finally read Linus Torvalds’ 2002 memoir “Just For Fun.” I really enjoyed its picture of Linux (and Torvalds) early in its success, with different chapters...
View ArticleCapturing Logs for Debugging SmartScreen
The Microsoft Edge browser makes use of a service called Microsoft Defender SmartScreen to help protect users from phishing websites and malicious downloads. The SmartScreen service integrates with a...
View ArticleEdge’s Super-Res Image Enhancement
One interesting feature that the Edge team is experimenting with this summer is called “SuperRes” or “Enhance Images.” This feature allows Microsoft Edge to use a Microsoft-built AI/ML service to...
View ArticleExtending Fiddler’s ImageView
Fiddler’s ImageView Inspector offers a lot of powerful functionality for inspecting images and discovering ways to shrink an image’s byte-weight without impacting its quality. Less well-known is the...
View ArticleAnalyzing Network Traffic Logs (NetLog json)
Previously, I’ve described how to capture a network traffic log from Microsoft Edge, Google Chrome, and applications based on Chromium or Electron. In this post, I aim to catalog some guidance for...
View ArticleCapture Network Logs from Edge and Chrome
Problems in accessing websites can often be found and fixed if the network traffic between the browser and the website is captured as the problem occurs. This short post explains how to capture such...
View ArticleFirefox 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...
View ArticleFiddler And LINQ
Since moving to Google at the beginning of 2016, I’ve gained some perspective about my work on Fiddler over the prior 12+ years. Mostly, I’m happy about what I accomplished, although I’m a bit awed...
View ArticleChrome Deprecates Subject CN Matching
If you’re using a Self-Signed certificate for your HTTPS server, a deprecation coming to Chrome may affect your workflow. Chrome 58 will require that certificates specify the hostname(s) to which they...
View ArticleUsing Fiddler With iOS 10 and Android 7
If you’ve tried to use Fiddler with iOS10 beta or Android 7 Nougat, you have probably found that HTTPS decryption isn’t working, even if you use the latest Fiddler and the Fiddler Certificate Maker...
View ArticleSilliness – Fiddler Blocks Malware
Enough malware researchers now depend upon Fiddler that some bad guys won’t even try to infect your system if you have Fiddler installed. The Malware Bytes blog post has the details, but the gist of it...
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