After recording network activity, select a network resource and then navigate to the updated Cookies tab to understand why that resource's request or response cookies were blocked. See Changes to the default behavior without SameSite to understand why you might be seeing more blocked cookies in Chrome 76 and later.
- Yellow Request Cookies were not sent over the wire. These are hidden by default. Click show filtered out request cookies to show them.
- Yellow Response Cookies were sent over the wire but not stored.
- Hover over More Information to learn why a cookie was blocked.
- Most of the data in the Request Cookies and Response Cookies tables comes from the resource's HTTP headers. The Domain, Path, and Expires/Max-Age data comes from the Chrome DevTools Protocol.
View cookie values
Click a row in the Cookies pane to view the value of that cookie.
Chromium issue #462370
Simulate different prefers-color-scheme and prefers-reduced-motion preferences
The prefers-color-scheme media query lets you match
your site's style to your user's preferences. For example, if the
media query is true, it means that your user has set their operating system to dark mode and
prefers dark mode UIs.
Open the Command Menu, run the Show Rendering
command, and then set the Emulate CSS media feature prefers-color-scheme dropdown to debug
prefers-color-scheme: dark and
prefers-color-scheme: light styles.
You can also simulate
prefers-reduced-motion: reduce using the Emulate CSS media feature
prefers-reduced-motion dropdown next to the Emulate CSS media feature prefers-color-scheme
Chromium issue #1004246
Code coverage updates
The Coverage tab now uses new colors to represent used and unused code. This color combination is proven to be more accessible for people with color vision deficiencies. The red bar on the left represents unused code, and the bluish bar on the right represents used code.
The Sources panel displays code coverage data when it is available. Clicking the red or bluish marks next to the line number opens the Coverage tab and highlights the file.
Debug why a network resource was requested
Console and Sources panels respect indentation preferences again
For a long time DevTools has had a setting to customize your indentation preference to 2 spaces, 4 spaces, 8 spaces, or tabs. Recently the setting was essentially useless because the Console and Sources panels were ignoring the setting. This bug is now fixed.
Go to Settings > Preferences > Sources > Default Indentation to set your preference.
Chromium issue #977394
New shortcuts for cursor navigation
Press Control+P in the Console or Sources panels to move your cursor to the line above. Press Control+N to move your cursor to the line below.
Chromium issue #983874
To discuss the new features and changes in this post, or anything else related to DevTools:
If you're on Mac or Windows, consider using Chrome Canary as your default development browser. Canary gives you access to the latest DevTools features.
Discover other DevTools features
Below is a list of everything that's been covered in the What's New In DevTools series.