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Page Inspector

Use the Page Inspector to examine and modify the HTML and CSS of a page.

You can examine pages loaded in the local copy of Firefox or in a remote target such as Firefox for Android. See {doc}about debugging <../about_colon_debugging/index> to learn how to connect the developer tools to a remote target.

User Interface Tour

To find your way around the Inspector, here's a {doc}quick tour of the UI <ui_tour/index>.

You can split the Rules view out into its own pane, separate from the other tabs on the CSS pane — this is called {doc}3-pane mode <3-pane_mode/index>.

How to

To find out what you can do with the Inspector, see the following how to guides:

  • {doc}Open the Inspector <how_to/open_the_inspector/index>
  • {doc}Examine and edit HTML <how_to/examine_and_edit_html/index>
  • {doc}Examine and edit the box model <how_to/examine_and_edit_the_box_model/index>
  • {doc}Inspect and select colors <how_to/inspect_and_select_colors/index>
  • {doc}Reposition elements in the page <how_to/reposition_elements_in_the_page/index>
  • {doc}Edit fonts <how_to/edit_fonts/index>
  • {doc}Visualize transforms <how_to/visualize_transforms/index>
  • {doc}Select an element <how_to/select_an_element/index>
  • {doc}Examine and edit CSS <how_to/examine_and_edit_css/index>
  • {doc}Examine event listeners <how_to/examine_event_listeners/index>
  • {doc}Work with animations <how_to/work_with_animations/index>
  • {doc}Edit CSS filters <how_to/edit_css_filters/index>
  • {doc}Edit CSS shapes <how_to/edit_css_shapes/index>
  • {doc}View background images <how_to/view_background_images/index>
  • {doc}Use the Inspector from the Web Console <how_to/use_the_inspector_from_the_web_console/index>
  • {doc}Examine CSS grid layouts <how_to/examine_grid_layouts/index>
  • {doc}Examine CSS flexbox layouts <how_to/examine_flexbox_layouts/index>
  • {doc}Use the Accessibility Inspector <../accessibility_inspector/index>

Reference

  • {ref}Keyboard shortcuts <keyboard-shortcuts-page-inspector>
  • {ref}Settings <settings-inspector>