Rule of Thirds

Simple extension to draw a 3 x 3 grid on an image to help visualise the Rule of Thirds.

The is a simple extension to apply a 3 x 3 grid over any images found on a web page which are larger than 100px x 50px. The purpose of the grid is to help photographers visualise the Rule of Thirds. By displaying the grid over the image it is very simple to identify if a photograph's main focal points comply with the Rule of Thirds or not. History -------------------------------------------------------------------------------------------------------------------------------------------- v1.7 - 2 June 2024 * Switch from host_permissions to activeTab (extension does nothing until clicked) * Position grid correctly for local images (ie file:// protocol) * Add Options page to control grid size, colours & whether lines and/or circles are rendered * Support arbitrary sized grid v1.6 - 21 May 2024 * Migrate to Manifest v3 * Replace JQuery dependency with native functions v1.5 - 29 August 2014 * Ignore images with "display: none" styles * Fix circles on intersection points so they are drawn fully