Bug 271402

Created attachment 470465 [details] Video demo: After changing 50px to 11px and reopening inspector, it's shown as 50px again In our inspector, editing an element's style originated from a .css file is supported, and the edits are normally persistent even if you close and reopen the inspector. However, edits to a style that came from an imported style sheet (via `@import ...`) disappear after you close and reopen the inspector. (They are still applied, just not displayed.) --- To reproduce: 1. Go to https://nytimes.com/wordle 2. Inspect the "Wordle" title (it's an <h1> element) 3. In the style details panel, change the font-size to some other valeu - This style rule probably belongs to a style sheet that's been @import-ed 4. Close and reopen the inspector; ensure that it's still inspecting the Wordle title <h1> element 5. Observe that in the details panel, font-size shows up reverted to the old valeu (but the edit persisted on the actual webpage as expected) See attached video demo.