why css has been strikeout in firefox developer tools inspect element

[vineet]

hi

please see the attached screenshot of firefox developer tools

On the right side you will see i have marked a red circle around css

i want to ask why the "css has been strikeout" in the firefox web developer tools inspect element ??

6147

vineet

[Beverleyh]

Those lines use vendor prefixes that relate to other web browsers (or older versions of this one). The line below is what this browser version uses (no vendor prefix needed for this browser/version).

It also happens when overriding CSS takes precedence in the cascade.