Appearance of dialog UI elements changed on Firefox 124

[aecreations]

Clippings 6.5.2.2 on Firefox 124.0b9

On macOS, the appearance of checkboxes has changed - the corners are now rounded, and the checkbox border is overridden with a lighter grey color. Drop-down menus now have rounded corners, instead of squared.

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Checkbox vertical alignment has also changed in the dialog windows; another example:

[aecreations]

This is due to recent changes made to chrome://browser/content/extension.css, which is imported by the AE Creations global style sheet (laf.css), and which will be released with Firefox 124.

To fix this, that style sheet should no longer be imported into extension pages, and laf.css should duplicate only the minimal style rules from extension.css that are needed to render UI elements correctly.