OpenCapture › Blog › Built-in vs extension
ComparisonYour browser already takes full-page screenshots. When do you actually need an extension?
Chrome, Firefox and Edge can all capture a whole scrolling page with no extension installed. Almost nobody knows the Chrome one exists, because it is buried in DevTools. Here is how to use each — and an honest account of where they stop.
The short version. For a one-off PNG of a page, use the browser. It is free, already installed, and there is nothing to trust. An extension earns its place when you need the things the built-in feature does not do at all: annotation, blurring, PDF export, and correct handling of pages long enough to hit the canvas ceiling.
How to do it without installing anything
All three can already do it. Firefox puts it in the right-click menu — Take Screenshot, then Save full page. Edge has Web capture on Ctrl + Shift + S, with a pen and an eraser afterwards. Chrome has no menu entry at all; the command lives in the developer tools.
The step-by-step for each, with screenshots and the gotchas at the save step, is in how to take a scrolling screenshot on desktop.
Where the built-in features stop
| Chrome DevTools | Firefox | Edge Web capture | Dedicated tool | |
|---|---|---|---|---|
| Full-page PNG | Yes | Yes | Yes | Yes |
| Discoverable | No — DevTools only | Yes | Yes | Yes |
| Annotation | No | No | Pen only | Yes |
| Blurring / blur | No | No | No | Yes |
| PDF export | No | No | No | Yes |
| Very long pages | Truncates or fails | Warns and caps | Caps | Splits or paginates |
| Handles lazy images | Partly | Partly | Partly | Waits for them |
The last two rows are where the difference is real rather than cosmetic. Every browser caps canvas size — on Chrome, 32,767px on one dimension — and past that limit the built-in capture does not warn you clearly; it hands back an image that is truncated or blank. On a long documentation page or a social feed, that is easy to hit.
The other difference: what happens next
The built-in tools give you a file and stop. That is a feature if all you wanted was the file. It becomes friction the moment the screenshot has a job to do — going into a ticket with an arrow on it, into a document with a customer name covered, into an email as a PDF that keeps the layout.
At that point the built-in route becomes: capture, open an image editor, annotate, blur, export, convert. Three tools instead of one, and the blurring step happens somewhere you have to think about, rather than before the file was ever written.
Worth saying plainly: if you take a screenshot once a month and paste it straight into a chat, the browser’s own feature is the right answer and an extension is overhead.
What to check before installing anything
The cost of an extension is not the download; it is the access. A full-page capture tool has to run code inside the page, and there are two ways to be granted that — narrowly, on click, for one tab, or broadly, for every site you visit, permanently. Most ask for the broad version. Check the permission list on the store page before installing; there is a fuller explanation in the piece on permissions.
Where OpenCapture sits
OpenCapture does the four things the built-in features do not: annotation, solid-block and blur
blurring, PDF export, and long pages split or paginated instead of truncated. It asks for
activeTab rather than access to every site, and the capture, editing and export
all run locally in a Rust/WebAssembly core, so nothing about the page is uploaded. It is free
and open source; the only paid element is an optional tiled-watermark feature ($5 for 1,000 credits, once).
If none of those four things are what you need, use DevTools. That advice costs us an install and it is still the right advice.
Common questions
How do I take a full-page screenshot in Chrome without an extension?
Open DevTools, press Ctrl+Shift+P, type
screenshot and choose Capture full size screenshot.
How do I take a full-page screenshot in Firefox?
Right-click the page, choose Take Screenshot, then Save full page.
Why did Chrome’s built-in full-page screenshot come out blank or cut off?
The page exceeded the browser’s canvas limit — 32,767px on one dimension on Chrome. Past that, drawing silently fails. Tools built for long pages split the output into segments instead.
Do I need a screenshot extension at all?
Only if you need annotation, blurring, PDF export, or pages long enough to break the built-in capture. For a one-off PNG, the browser’s own feature is enough.