I’ll be delivering two talks (about HTTPS and Fiddler) at the DevReach 2017 conference in Sofia, Bulgaria. It’ll be fun to get back to Europe, and I’m looking forward to seeing old friends and colleagues. Hope to see some of y’all there! -Eric
Category Archives: fiddler
Fiddler 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 about how much work I put into it, and how big my “little side project” turned out to be. It’sContinue reading “Fiddler And LINQ”
Using 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 add-on. Unfortunately, at the moment both platforms are broken, but for different reasons. In both cases, the client will fail toContinue reading “Using Fiddler With iOS 10 and Android 7”
Silliness – 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 is that the attackers use JavaScript to probe the would-be victim’s PC for a variety of software. Beyond Kaspersky,Continue reading “Silliness – Fiddler Blocks Malware”
Automatically Evaluating Compressibility
Fiddler’s Transformer tab has long been a simple way to examine the use of HTTP compression of web assets, especially as new compression engines (like Zopfli) and compression formats (like Brotli) arose. However, the one-Session-at-a-time design of the Transformer tab means it is cumbersome to use to evaluate the compressibility of an entire page orContinue reading “Automatically Evaluating Compressibility”
What’s New in Fiddler 4.6.2
TLDR? – Get the newest Fiddler here. It’s been just over two months since the last significant release, and Fiddler 4.6.2.0 (and v2.6.2.0) are now available. As always, the latest build includes a slew of bugfixes and minor tweaks, as well as a number of features described in this post. Default Certificate Generator Changed ChangesContinue reading “What’s New in Fiddler 4.6.2”
Segue
My last day at Telerik is December 31st, 2015. More soon… Here’s a copy of my “Last day” blog post for posterity. Fiddler—A Segue by Eric Lawrence December 22, 2015 Productivity, Debugging11 Comments In September 2012, Telerik completed the acquisition of the Fiddler Web Debugger, and I announced that I would join Telerik to upgrade my side project to my full-time job.Continue reading “Segue”
Understanding CONNECT Tunnels
When a browser needs to send a HTTPS request through a proxy (like Fiddler), there’s a bit of a problem. The proxy needs to know where to send the client’s request, but the whole point of protecting traffic with HTTPS is that the content is encrypted and cannot be read by anyone else on theContinue reading “Understanding CONNECT Tunnels”
Reset Fiddler’s HTTPS certificates
I’ve made changes to the latest versions of Fiddler to improve the performance of certificate creation, and to avoid problems with new certificate validation logic coming to Chrome and Firefox. The biggest of the Fiddler changes is that CertEnroll is now the default certificate generator on Windows 7 and later. Unfortunately, this change can causeContinue reading “Reset Fiddler’s HTTPS certificates”
What’s New in Fiddler 4.6.0.7
TLDR? – Get the newest Fiddler here. We’re performing a staged rollout of this build; it won’t be on autoupdate until next week. Under the Hood As mentioned in our notes about the Fiddler 4.6 release, we’ve started taking a very close look at Fiddler’s performance. Fiddler’s use of the CPU, system memory, and theContinue reading “What’s New in Fiddler 4.6.0.7”
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