So, to resolve this problem, a PDF viewer is shipped with modern browsers by default. This takes a lot of unnecessary space and memory, making your computer even slow. There was a time when you needed to download a stand-alone PDF reader application on your computer just to deal with PDF reading needs. Why do you need a PDF Reader extension? The PDF format is popular, and many people still use it for publishing their work from word documents to images.

Has many built-in tools to facilitate PDF reading and searching.

Displays the PDF content as soon as the PDF file is partially fetched from the server.

For the local PDF files to be considered, make sure to enable the 'Local File Access' option from the extensions manager window of your browser. This extension can open both server-side links and local PDF files. The extension first fetches the resource and then renders it into the active view. This PDF viewer only observes the top-level requests and skips all the iframe requests since those requests are usually meant for a quick view of documents and are not meant to be viewed with a full-featured PDF reader. So the default PDF reader of your browser is being replaced by this extension.

After installation, all top-level PDF requests are directed to this extension. The extension employs the well-known open-source PDF.js library to deal with progressive fetching, parsing, and rendering.

The 'PDF Reader' extension brings Mozilla's robust PDF reader to the Chromium-based browsers.

Fire fox pdf reader