Smarter Defaults by Paying Attention

As a part of every page load, browsers have to make dozens, hundreds, or even thousands of decisions of varying levels of importance: should a particular API be available? Should a resource load be permitted? Should script be allowed to run? Should video be allowed to start playing automatically? Should cookies or credentials be sentContinue reading “Smarter Defaults by Paying Attention”

MHTML in Chromium

The MHTML file format (aka “Webpage, single file”) allows a single file to contain the multiple resources that are used to load a webpage (script, css, images, etc). Edge (Chromium) has code to provide limited support for MHTML, though it retains an option to use the format when saving the current page via Ctrl+S orContinue reading “MHTML in Chromium”

Adding Protocol Schemes to Chromium

Previously, I’ve written a lot about Application Protocols, which are a simple and popular common mechanism for browsers to send a short string of data out to an external application for handling. For instance, mailto is a common example of a scheme treated as an Application Protocol; if you invoke mailto:someone@somewhere.com, the browser will convertContinue reading “Adding Protocol Schemes to Chromium”

Debugging Compatibility in Edge

Background By moving from our old codebase to Chromium, the Microsoft Edge team significantly modernized our codebase and improved our compatibility with websites. As we now share the vast majority of our web platform code with the market-leading browser, it’s rare to find websites that behave differently in Edge when compared to Chrome, Brave, Opera,Continue reading “Debugging Compatibility in Edge”

Trim Your Whitespace

Leading and trailing whitespace are generally invisible. Humans are bad at dealing with things they can’t see. If your system accepts textual codes, or any other human-generated or human-mediated input, you should trim whitespace, whether it’s leading, trailing, or inline (if not meaningful). // Trim leading and trailing whitespace $(‘inputCode’).value = $(‘inputCode’).value.trim(); It’s downright sillyContinue reading “Trim Your Whitespace”

Microsoft Edge’s Many Processes

Chromium-based browsers like Microsoft Edge use a multi-process architecture for reliability and security reasons. tl;dr For reliability, Process isolation means that if one process crashes, the entire browser need not go down. For example, if a page on leaky.com has a memory leak that’s so bad that its tab crashes with an out-of-memory error, yourContinue reading “Microsoft Edge’s Many Processes”

Great Bug Reports via “Recreate My Problem” in Microsoft Edge

When you encounter a problem in Microsoft Edge, you can let the team know about it using the … Menu > Help and Feedback > Send Feedback command. Clicking this menu item will open Edge’s feedback wizard, which provides tons of options about what information will be submitted along with your bug report. Generally speaking,Continue reading “Great Bug Reports via “Recreate My Problem” in Microsoft Edge”

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”

MoarTLS: Non-Secure Download Blocking

With little fanfare, an important security change has arrived on the web. Now, all major browsers (except Safari) block non-secure downloads from a secure page. Browser Version Behavior Edge 94+ Block with right-click “Keep” button Chrome 94 Block Silently Firefox 93 Block with “Allow download” button Brave 1.30.89 Block Silently Opera 79.0.4143.72 Block Silently SafariContinue reading “MoarTLS: Non-Secure Download Blocking”