Definitely late to the party but...
https://github.com/fregante/GhostText https://github.com/alpha22jp/atomic-chrome(use-package atomic-chrome
:config
(atomic-chrome-start-server)
(setq atomic-chrome-buffer-open-style 'frame)
(setq atomic-chrome-url-major-mode-alist
'(("overleaf\\.com" . latex-mode)
("gitlab\\.com" . markdown-mode)))
)
