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Freedom251 › Blog › Firefox DevTools

How to Take a Full-Page Screenshot of a Webpage with Animated Content

By Freedom251 Team · · 4 min read

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To capture an entire webpage, use Firefox’s Web Console command :screenshot --fullpage for a one-off image, or Playwright’s fullPage: true for repeatable automation. A screenshot is a still frame: Playwright can disable CSS animations, transitions, and Web Animations, but that setting does not guarantee a chosen frame from a GIF, video, or canvas animation.

Choose the capture method that fits

Need Method Best for
One-off full-page PNG Firefox DevTools Web Console Capturing a page manually without writing a script.
Repeatable capture or control over CSS motion Playwright page screenshot API Automated workflows and a steadier still image.
Only one component Playwright locator screenshot or Firefox --selector Capturing a specific element rather than the entire page.

“Full page” means the full scrollable webpage, including content outside the current browser window—not just the visible viewport. [Playwright] [Mozilla Firefox Source Docs]

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Take a full-page screenshot manually in Firefox

  1. Open the webpage in Firefox.
  2. Open the Web Console in DevTools.
  3. Enter :screenshot --fullpage and run the command. Firefox saves an image that includes page content outside the current window bounds. [Mozilla documentation]

Choose a filename or capture an element

Use the documented --filename option to specify a PNG filename. Check the filename before capturing again: Mozilla warns that saving to an existing filename overwrites it. The Web Console helper also documents --selector for a selected element and --dpr to set the device pixel ratio. These are Web Console helper options, not necessarily controls in Firefox’s ordinary screenshot menu. [Mozilla Firefox Source Docs]

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Capture a full page with Playwright

Use Playwright when you need a repeatable scripted capture. The following Node.js line saves the whole scrollable page to page.png:

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

Playwright describes this as capturing the whole scrollable page as if it were displayed on a very tall screen. The screenshot API can also return image data as a buffer for post-processing. [Playwright documentation]

Disable supported web animations for a steadier still

If CSS-based motion is making the captured state unpredictable and you prefer a static result, set animations: 'disabled':

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

For the page.screenshot API, the documented default is allow. With animations disabled, finite animations are fast-forwarded to completion; infinite animations are canceled to their initial state and played over after the screenshot. This behavior applies to CSS animations, CSS transitions, and Web Animations. Do not confuse it with Playwright’s separate screenshot assertion API, whose documented default for animation handling is disabled. [Playwright documentation]

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Handle GIFs, videos, and other animated content

A PNG, JPEG, or WebP screenshot records one visual state; it does not preserve motion. Playwright’s documented animation option does not establish that a particular frame will be selected from an animated GIF, video, canvas animation, or every site-specific animation mechanism.

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  • If the exact moment matters, pause or seek the media with the page’s own controls where available before capturing. This is practical guidance, not a behavior guaranteed by the screenshot options.
  • For CSS motion, use animations: 'disabled' when a settled state is preferable to preserving the observed animation.
  • Inspect the resulting file for the desired frame and for content that might load below the fold, including lazy-loaded areas and sticky or fixed elements. The cited documentation does not establish how every page handles those cases.

Capture one element instead of the whole page

If the page contains unrelated content and you only need a component, Playwright supports a locator screenshot; Firefox’s Web Console helper documents --selector. Element-only capture can keep the result focused. See the Playwright screenshot documentation and Firefox helper documentation for their respective APIs.

Troubleshoot unexpected captures

  • The image stops at the viewport: Check that the Firefox command includes --fullpage or that the Playwright call includes fullPage: true.
  • The animation is at an unwanted state: For CSS animations, transitions, or Web Animations, try Playwright’s animations: 'disabled'. For video or GIF content, pause or seek it using the page’s own controls and inspect the result.
  • Some lower-page content is missing: Verify the saved image, especially where a site loads content lazily or changes layout while scrolling. The documented full-page options do not guarantee how every page renders such content.
  • A previous file disappeared: Firefox warns that capture to an existing filename overwrites it. Choose a new filename using --filename.
  • The browser screenshot command is unavailable: Confirm you are using the Firefox DevTools Web Console helper. The documented command is not necessarily part of the standard screenshot menu.

Or skip the browser setup

ScreenshotNeo provides a website screenshot API and MCP server. Make a GET request with the page URL to return an image or PDF. For example, this cURL request saves a WebP screenshot of Stripe:

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

See the ScreenshotNeo documentation for the API details. Cookie/consent banners, newsletter popups, and chat widgets are removed before capture; each of those steps can be turned off. Bot checks, blank pages, timeouts, failed loads, and cache hits are not billed, and the response includes X-Page-Verdict and X-Billed headers. Its MCP server provides take_screenshot, get_page_info, and capture_pdf tools for Claude, Cursor, and other MCP clients. The free plan includes 1,000 screenshots a month with no card; paid plans start at $5 for 3,000 shots.

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Sign up for 1,000 free screenshots a month—no card required.

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Frequently Asked Questions

Does a full-page screenshot include content below the fold?

Yes. The full-page options described here capture the scrollable webpage beyond the visible browser window.

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Will disabling Playwright animations choose a particular video or GIF frame?

No such behavior is established by the documented animation setting. It covers CSS animations, CSS transitions, and Web Animations.

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Firefox DevToolsPlaywrightweb automationWeb developmentweb screenshots

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