Examine source code of Pink Flowers...

{
  "theme": {
    "images": {
      "theme_frame": "PinkFlowers_header_byLisa.jpg"
    },
    "colors": {
      "frame": "#dae88e",
      "tab_background_text": "#666600"
    }
  },
  "version": "2.0",
  "name": "Pink Flowers...",
  "manifest_version": 2,
  "description": "A beautiful arrangement of pink vector flowers splash across your Firefox browser. [Nature, Scenery, floral, vector art, Asian Art] \n\nchild friendly persona\n\nPersonas by LisaAtTheBeach"
}