Developer settings
For working on the siteThese change where the page gets its content, not how it looks. They are stored in the same cookie as every other setting, so the server renders from whichever one is chosen here.
Where images, comments and topics come fromMock data never changes and needs no network, which is what makes a layout comparable between two runs. Live data is read-only and anonymous: the origin's default filter applies, and faves and watched tags are empty until sign-in exists.