;; browser
(defun my-browse-url-in-chromium (url &rest ARGS)
  "Open URL in a new chromium tab"
  (interactive (browse-url-interactive-arg "URL: "))
  (call-process "sh" nil t nil "-c" (concat "chromium-browser " url)))
(setq browse-url-browser-function 'my-browse-url-in-chromium)
(setq browse-url-default-browser 'chromium-browser)