Feature | Firefox PDF Viewer (PDF.js) | Okular |
---|---|---|
Browser integration | ||
Google Chrome extension | ||
Firefox extension | ||
Add/remove pages | ||
Browser extension | ||
Google Chrome Extensions | ||
Firefox Extensions | ||
Support for Javascript | ||
Lightweight | ||
Opera extension | ||
Low memory usage | ||
Highlighter | ||
Optimal performance | ||
PDF annotation | ||
Fill PDF Forms | ||
Edit PDF | ||
Handwriting recognition | ||
Multiple languages | ||
Export to PDF | ||
Document annotations | ||
Sync between devices | ||
PDF OCR | ||
Clean design | ||
Customer support | ||
Cross-platform | ||
Portable | ||
Vim key mapping | ||
Built-in Image converter | ||
Image resizing | ||
Customizable | ||
Google Drive integration | ||
Night mode/Dark Theme | ||
Ad-free | ||
Tabbed interface | ||
Chapter cursor | ||
Document reader | ||
Text Highlighting | ||
Text to Speech | ||
Trim margins | ||
Batch conversion | ||
Built-in e-Book converter | ||
Built-in viewer | ||
Scan documents | ||
File transfer | ||
Freehand Writing | ||
iPhone/iPod sync |