add keybinding for quick help

[anarcat]

Link hints is amazing! I started using it after dropping out of more complicated plugins like vimperator and so on, i love how minimalist yet powerful enough it is.... yet!

Problem

I went through the tutorial, and thought I registered the keybindings in my brain, but somehow only alt-j stuck. I keep having to wander back into the extension to figure out the rest.

Suggestion

Have key shortcut (alt-h seems to be taken in Firefox, obviously, maybe alt-shitf-h?) that pops open a quick reference for key shortcuts.

Right now, to get that list i need to click (click! how outrageous! :) on the addons button, then on the link hints extension, then on "Options", to get the information I need.

Debug info

Debug info

{
  "version": "1.3.1",
  "browser": "firefox",
  "userAgent": "Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/115.0",
  "browserInfo": {
    "name": "Firefox",
    "vendor": "Mozilla",
    "version": "115.4.0",
    "buildID": "20231016232700"
  },
  "platformInfo": {
    "os": "linux",
    "arch": "x86-64"
  },
  "storage.sync": {
    "css": ".hint {\nbackground-color: #68A8E4;\n}\n\n.highlighted {\nbackground-color: #98BC37;\n}"
  },
  "storage.local": {
    "tutorialShown": true
  },
  "language": "en-GB"
}

Thanks again for this great extension, and sorry if I missed something obvious! :)

PS: maybe having a way to trigger the extension's options dialog with a keybinding would be enough, of course!