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To capture a webpage from top to bottom on Ubuntu, use Firefox’s Take Screenshot feature and choose Save full page. Ubuntu’s desktop screenshot tool captures the screen, a window, or a selected area; it does not replace Firefox’s full-document webpage capture.

Capture a full webpage in Firefox

  1. Open the webpage in Firefox and wait for the content you need to document to appear.

  2. Open the page context menu and choose Take Screenshot.

  3. Choose Save full page to capture content beyond the visible browser window. Choose Save visible only if you need the current viewport.

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  4. Download the image. Give it a descriptive filename that identifies the page or procedure.

  5. Review the saved image before publishing. Check that it contains the intended content and does not include menus, transient overlays, or unrelated browser UI.

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Mozilla documents these full-page and visible-area options in its Firefox screenshot instructions.

Use Firefox Developer Tools if the menu option is unavailable

Firefox Developer Tools has a full-page screenshot control. If you do not see the screenshot button, enable it in Developer Tools settings under Available Toolbox Buttons. Use the button to capture the page; Firefox saves the screenshot to Downloads. See Mozilla’s Developer Tools screenshot documentation.

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Capture a full page from the Web Console

For a repeatable, command-based workflow, Firefox’s Web Console provides a screenshot helper with the --fullpage option. Enter this in the Web Console:

:screenshot --fullpage

The option captures content beyond the browser window’s current bounds. Mozilla documents additional options, including a filename, delay, device pixel ratio, and CSS selector, in its Web Console helpers reference.

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When to use Ubuntu’s screenshot utility

Ubuntu’s desktop screenshot utility can capture the entire screen, a window, or a selected area, and saves screenshots in Pictures/Screenshots. It is appropriate when your documentation needs the desktop or application chrome. For a webpage that continues below the visible viewport, use Firefox’s full-page capture instead. See Ubuntu’s screenshot and screencast help.

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Or skip the browser setup

For repeatable captures from a script or service, ScreenshotNeo takes a screenshot with one GET request. For example, save a PNG capture of the target page:

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Quick Recap

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curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://example.com -o shot.png

See the ScreenshotNeo API documentation for setup and parameters. Cookie banners, newsletter popups, and chat widgets are removed before the shot; each step can be turned off. Bot checks, blank pages, and failed loads are not billed. An MCP server lets AI agents use screenshot tools, and the free plan includes 1,000 screenshots a month with no card; paid plans start at $5 for 3,000. Sign up for 1,000 free screenshots a month, with no card.

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