PDF Viewer for Vimium C is a customized PDF viewer that supports Vimium C shortcuts. Built on the unofficial version of the PDF.js project, this viewer allows users to view the content of PDF files while actively requesting Vimium C's support.

The PDF.js version used in this viewer is v2+, which is up-to-date as of August 8, 2022. It is built from commit 40f9f7e9097e1168e98f1e2987726c5c31693617 of the PDF.js repository on GitHub. Additionally, the developer has made modifications to the viewer, which can be found at commit c785e93bb11febb98b373db74aca358d8ac086fc on the developer's GitHub repository.

Recent updates to the PDF Viewer for Vimium C include turning off the experimental feature of using iframes to show top-frame PDFs by default. This change was made to address issues with accessing PDF files on certain web servers. Users have the option to re-enable this feature if desired. Other updates include the version update of PDF.js and fixes for some issues with Vimium C's scroll and Marks commands.