## Todo list
* Core: sometime, press key no respsone.
* Browser: add cookie support
* Browser: support pop window, such as emacs-china.org
* Browser: add progressbar
* Browser: add proxy support
* Browser: implement js plugin like vimium
* ImageViewer: add zoom support
* VideoPlayer: remember video play progress.
* PdfViewer: render current page and total page
* PdfViewer: use emacs interactive instead read page number in pdf viewer.
* PdfViewer: use mupdf/page.searchFor implement search text in pdf.
* Terminal: https://github.com/hrngultekin/pyqtermwidget5 looks good enough