Spooky: Enhancing Dark Mode in Chromium

I am not really a fan of Dark Mode — I like my screens bright and shiny. But it’s October, and it’s sometimes fun to make things dark and spooky. Some users of my Show Browser Version extension wanted it to better support Dark Mode– the default text colors didn’t work well when the browserContinue reading “Spooky: Enhancing Dark Mode in Chromium”

Practical Time Machines

Many “emergency” situations in our modern world would’ve been easy to fix had they been foreseen in advance. If only we’d known what was going to happen, the badness could’ve easily been prevented. Unfortunately, when problems are discovered only “as they happen” in production, everyone must race to minimize the damage and put out theContinue reading “Practical Time Machines”

Determining OS Platform Version

In general, you should not care what Operating System visitors are using to visit your website. If you attempt to be clever, you will often get it wrong and cause problems that are an annoyance for users and a hassle for me to debug. So avoid trying to be nosy/clever if at all possible. ThatContinue reading “Determining OS Platform Version”

Download Blocking by File Type

I’ve previously spoken about the magic of the File Type Policies component — a mechanism that allows files to be classified by their level of “dangerousness”, such that harmless files (e.g. .txt files) can be downloaded freely, whilst potentially-dangerous files (e.g. .dll files) are subjected to a higher degree of vetting and a more security-consciousContinue reading “Download Blocking by File Type”

Per-Site Permissions in Edge

Last year, I wrote about how the new Microsoft Edge browser mostly ignores Security Zones (except in very rare circumstances) to configure security and permissions decisions. Instead, in Chromium per-site permissions are controlled by settings and policies expressed using a simple syntax with limited wildcarding support. Settings Page’s Site Permissions and Group Policy Internet ExplorerContinue reading “Per-Site Permissions in Edge”

Client Certificates and Logout

Back in May, I wrote about Client Certificate Authentication, a mechanism that allows websites to strongly validate the identity of their visitors using certificates presented by the visitor’s browser. One significant limitation for client certificate authentication is that there is no standards-based mechanism for a user to “log out” of a site that uses thatContinue reading “Client Certificates and Logout”

Analyzing 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 looking at these logs to help find the root cause of captured problems and otherwise make sense of the data collected. Last Update:Continue reading “Analyzing Network Traffic Logs (NetLog json)”

Debugging Proxy Configuration Scripts in the new Edge

I’ve written about Browser Proxy Configuration a few times over the years, and I’m delighted that Chromium has accurate & up-to-date documentation for its proxy support. One thing I’d like to call out is that Microsoft Edge’s new Chromium foundation introduces a convenient new debugging feature for debugging the behavior of Proxy AutoConfiguration (PAC) scripts.Continue reading “Debugging Proxy Configuration Scripts in the new Edge”

Enigma Conference 2020 – Browser Privacy Panel

Brave, Mozilla Firefox, Google Chrome and Microsoft Edge presented on our current privacy work at the Enigma 2020 conference in late January. The talks were mostly high-level, but there were a few feature-level slides for each browser. My ~10 minute presentation on Microsoft Edge was first, followed by Firefox, Chrome, and Brave. At 40 minutesContinue reading “Enigma Conference 2020 – Browser Privacy Panel”

“Can I… in the new Edge?” (Un-FAQ)

This post is intended to collect a random set of questions I’ve been asked multiple times about the new Chromium-based Edge. I’ll add to it over time. I wouldn’t call this a FAQ because these questions, while repeated, are not frequently asked. Last Update: November 11, 2021 Can I get a list of all supportedContinue reading ““Can I… in the new Edge?” (Un-FAQ)”