It displays each rule as in a stylesheet, with a list of selectors followed by a list of property:value declarations. In addition to compatibility tooltips, the CSS Compatibility View shows any CSS compatibility issues for both the selected element and for the current page (as a whole).įor more information see: Page Inspector > CSS Compatibility View. The tooltips, which arepopulated from the MDN browser compatibility project, identify the reason for the incompatibility (not supported, deprecated, experimental etc.), display icons for incompatible browsers, and provide a link to the associated property page for more information. This feature is enabled from Firefox 81 by setting the preference -compatibility-warning.enabled to true (open about:config in the URL bar to view/set Firefox preferences). From Firefox 81, compatibility tooltips may be displayed next to any CSS properties that have known compatibility issues,as shown below. In the following example, a spelling error, “background-colour” instead of “background-color” has made the rule invalid: Browser compat warnings ¶ĬSS properties have varied level of support across different browsers. This can help you understand why certain styles are not being applied. You can:Ĭhange the display based on prefers-color-scheme media rules.Ĭhange the display based on print media rules.Ī warning icon appears next to unsupported CSS properties or rules that have invalid values. The six buttons on the right top of the rules view allow you to change the display of certain CSS and rules view features. The Rules view lists all the rules that apply to the selected element, ordered from most-specific to least-specific: You can examine and edit CSS in the Inspector’s CSS pane.
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