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Freedom251 › Blog › Firefox

How to Capture a Full-Page Screenshot of a Website with Sticky Navigation

By Freedom251 Team · · 4 min read

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For a quick capture, use Firefox’s built-in full-page screenshot; for repeatable captures, use Playwright’s fullPage: true option. Sticky or fixed navigation may repeat or overlap content in some capture implementations, so inspect the finished image. If it does, temporarily disable or hide the navigation for the capture, then restore the page.

Capture a full page in Firefox

Firefox can capture the entire page without installing an extension. Enable the screenshot button in Developer Tools if it is not already available.

  1. Open Developer Tools and open its settings.
  2. Under Available Toolbox Buttons, enable Take a screenshot of the entire page.
  3. Use the screenshot button in the Developer Tools toolbar to save the full page. Firefox can save the image to Downloads.

For a command-line-style alternative inside Firefox, open the Web Console and run:

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:screenshot page.png --fullpage

Firefox’s :screenshot helper also supports a delay, device-pixel ratio, filename, clipboard copying, and capturing an element by CSS selector. See the Firefox screenshot documentation and Firefox DevTools tips for details. If you capture again using the same filename, Firefox warns that the new image will overwrite the old one.

Capture the full page with Playwright

For automated or repeatable captures, Playwright’s page screenshot option can include the full scrollable page. The browser must first be open on the target page.

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await page.screenshot({ path: 'page.png', fullPage: true });

Playwright describes a full-page screenshot as capturing the entire scrollable page as if it fit on a very tall screen. To capture just one element instead, use a locator screenshot:

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await page.locator('main').screenshot({ path: 'main.png' });

Replace main with a selector for the element you want. Read the Playwright screenshot documentation for the API details.

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Check how sticky navigation appears

There is no universal rule that a sticky header will repeat in every full-page screenshot. Some capture implementations that scroll through a page can include fixed navigation or ads repeatedly in the resulting image. Dynamic content loading near the bottom can also produce overlaps. Those behaviors have been described for particular implementations, not established as inevitable in current Firefox or Playwright.

  1. Open the saved image and check the full length of the page, not just its top.
  2. Look for navigation repeated at intervals, content hidden beneath a bar, overlap, or missing sections.
  3. If the bar repeats or obstructs content, use Developer Tools to inspect the navigation element. Temporarily disable its sticky or fixed positioning, or hide it with a temporary CSS change, then capture again.
  4. Restore the original page styling after the capture. The CSS workaround is a practical troubleshooting option, not a guarantee for every site or capture method.

Pay particular attention to pages with sticky headers, ads, lazy-loaded images, or infinite scrolling. A page that changes as it scrolls may need time to load before the capture, and the output should be checked for missing or shifted content. Evidence about repeated fixed elements and overlap comes from a specific scrolling-capture implementation described in a University of Tartu thesis; it should not be taken as a description of every browser’s current behavior.

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Choose full-page or element capture

  • Full-page: Use it when you need the whole scrollable page in one image, then inspect the result for sticky elements or dynamic-content problems.
  • Element capture: Use a CSS selector in Firefox or a locator in Playwright when you need a particular section without the rest of the page.
  • Manual or automated: Firefox is convenient for a one-off capture; Playwright is suitable when the same capture needs to be repeated in code.
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Or skip the browser setup

ScreenshotNeo is a website screenshot API and MCP server. One GET request can return a website screenshot as PNG, JPEG, or WebP, or a PDF. Its capture options include full-page screenshots with lazy images loaded, and its clean-shot steps can accept cookie or consent banners and remove known consent platforms, newsletter popups, and chat widgets. Each step can be turned off.

For a quick full-page capture, send a request like this; the API accepts other screenshot services’ parameter names too, which can make switching easier:

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

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Replace the example URL with the page you want to capture. The command saves the response as shot.webp. See the ScreenshotNeo API documentation for setup and available parameters.

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  • Bot checks or CAPTCHAs, blank pages, timeouts, failed loads, and cache hits cost nothing; response headers identify the page verdict and whether it was billed.
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Troubleshoot common capture problems

  • The screenshot button is missing in Firefox: Open Developer Tools settings and enable Take a screenshot of the entire page under Available Toolbox Buttons.
  • The sticky bar appears several times: Inspect the image. If needed, temporarily change the bar’s sticky or fixed positioning or hide it in Developer Tools, recapture, and restore the styling.
  • Content overlaps or is missing: Check whether content loads as the page scrolls, especially near the bottom. Wait for it to appear before capturing and verify the saved image.
  • A new Firefox capture replaced the previous one: Give the next capture a different filename; Firefox warns when a repeated filename will overwrite an existing image.
  • You only need one section: Capture an element by CSS selector with Firefox’s screenshot helper or use Playwright’s locator screenshot method.

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Firefoxfull-page screenshotPlaywrightScreenshotNeosticky navigation

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