Can this extension be used to prevent websites from hijacking keys?

[realestninja]

Hi,

I'm actually looking for a way to outsmart websites from hijacking keyboard shortcuts.

Known offenders:

• v2 of MS Teams: https://teams.microsoft.com/v2/
• Jira: https://www.atlassian.com/software/jira

Both of them override the [alt + numerical key] which is a big pain in the ass.

My hope was that by using this browser extension, I could override what they have done but that doesn't work.

Would this be possible in theory by making changes to this extension?

[nalply]

I have some websites that bind ArrowRight and ArrowLeft for video time line jumping and their programmers were so incompetent to accidentally also bind the Firefox shortcuts for history navigation Alt-Left and Alt-Right.

Please have a look at my TamperMonkey user script to keep the shortcuts. I dedicate this source code to the public domain or put it to Creative Commons CC0 "No Rights Reserved" whatever you prefer.

// ==UserScript==
// @name         KeepHistoryShortcuts
// @namespace    https://github.com/nalply
// @version      2024-06-01
// @description  Alt-Left and Alt-Right are shortcuts to navigate history. Keep them!
// @author       nalply
// @match        https://*/*
// @run-at       dpcument-start
// @grant        none
// ==/UserScript==

// Capture keydown events before anything else and stops propagation for Alt-ArrowLeft and Alt-ArrowRight.
// This needs run-at: document-start and { capture: true } as third parameter to addEventListener().

'use strict'

console.log("KHS: KeepHistoryShortcuts user script started")

document.addEventListener('keydown', forceDefault, { capture: true })

function forceDefault(ev) {
  if (ev.altKey && (ev.key == "ArrowRight" || ev.key == "ArrowLeft")) {
    console.log("KHS: keypress kept for browser", ev.key)
    ev.stopImmediatePropagation()
  }
}