Collections use chevron arrows to indicate minimized status, rather than italic font, for consistency with other collapsible items
Delete collection modal title and body contents have been revised to improve clarity, and the delete button is red with a trash icon to improve visual indication that its action is destructive, and to differentiate it from the close button
Thanks for the contribution! I'll make a release of the changes you made and submit a new version to Mozilla and Google. It may take a few days before it is out
UI improvements to Collections list