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docs/faq.md

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+---
+title: "FAQ"
+description: "Explore Frequently Asked Questions regarding html2canvas"
+---
+
+## Why aren't my images rendered?
+html2canvas does not get around content policy restrictions set by your browser. Drawing images that reside outside of 
+the [origin](https://developer.mozilla.org/en-US/docs/Web/Security/Same-origin_policy) of the current page [taint the 
+canvas](https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image#What_is_a_tainted_canvas) that they are drawn upon. If the canvas gets tainted, it cannot be read anymore. As such, html2canvas implements 
+methods to check whether an image would taint the canvas before applying it. If you have set the `allowTaint` 
+[option](/configuration) to `false`, it will not draw the image.
+
+If you wish to load images that reside outside of your pages origin, you can use a [proxy](/proxy) to load the images.
+
+## Why is the produced canvas empty or cuts off half way through?
+Make sure that `canvas` element doesn't hit [browser limitations](https://stackoverflow.com/questions/6081483/maximum-size-of-a-canvas-element) for the `canvas` size. 
+The limitations vary by browser, operating system and system hardware.
+
+### Chrome
+> Maximum height/width: 32,767 pixels
+> Maximum area: 268,435,456 pixels (e.g., 16,384 x 16,384)
+
+### Firefox
+> Maximum height/width: 32,767 pixels
+> Maximum area: 472,907,776 pixels (e.g., 22,528 x 20,992)
+
+### Internet Explorer
+> Maximum height/width: 8,192 pixels
+> Maximum area: N/A
+
+### iOS
+> The maximum size for a canvas element is 3 megapixels for devices with less than 256 MB RAM and 5 megapixels for devices with greater or equal than 256 MB RAM
+
+## Why doesn't CSS property X render correctly or only partially?
+As each CSS property needs to be manually coded to render correctly, html2canvas will *never* have full CSS support. 
+The library tries to support the most [commonly used CSS properties](/features) to the extent that it can. If some CSS property 
+is missing or incomplete and you feel that it should be part of the library, create test cases for it and a new issue for it.
+
+## How do I get html2canvas to work in a browser extension?
+You shouldn't use html2canvas in a browser extension. Most browsers have native support for capturing screenshots from 
+tabs within extensions. Relevant information for [Chrome](https://developer.chrome.com/extensions/tabs#method-captureVisibleTab) and 
+[Firefox](https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D#drawWindow()).