Simple browser selector for Linux, requires yad to display GTK+ dialog

browser-chooser.desktop

[Desktop Entry]
Name=Browser Chooser
GenericName=Browser Chooser
Comment=Select a browser to access the Internet
Categories=Network;WebBrowser;
Icon=browser
Type=Application
Exec=browser-chooser.sh --url %u
MimeType=application/pdf;application/rdf+xml;application/rss+xml;application/xhtml+xml;application/xhtml_xml;application/xml;image/gif;image/jpeg;image/png;image/webp;text/html;text/xml;x-scheme-handler/http;x-scheme-handler/https;

browser-chooser.sh

#!/usr/bin/env bash

# Variables
ARGC=$#
ARGV=("$@")
URLRE="^(https?|ftp|file)://[-A-Za-z0-9\+&@#/%?=~_|!:,.;]*[-A-Za-z0-9\+&@#/%=~_|]\.[-A-Za-z0-9\+&@#/%?=~_|!:,.;]*[-A-Za-z0-9\+&@#/%=~_|]$"
RULES="${HOME}/.config/browser-rules.txt"

# Help
help() {
  echo "Usage: $0 [--dry-run] --url URL"
  exit 1
}

# Fail if not enough args provided
if [[ $ARGC -lt 2 ]]; then
  help
fi

# Parse args
for ((idx = 0; idx < ARGC; idx++)); do
  OPT="${ARGV[idx]}"
  NEXTOPT="${ARGV[idx + 1]}"
  case "$OPT" in
    # URL is next arg only if next arg is a valid URL
    --url) grep -q -E "$URLRE" <<<"$NEXTOPT" && URL="$NEXTOPT" ;;
    # When dry run is enabled, print the browse() function call on the screen instead of executing the function
    --dry-run) CMD=("echo") ;;
  esac
done

# Check if a valid URL was provided
if [[ -z "$URL" ]]; then
  echo "Invalid URL or no URL provided"
  help
fi

# Try to set browser from rules
if [[ -f "$RULES" ]]; then
  # RULES file has two columns separated by a "|"
  # 1st column is the URL/keyword, second is browser name
  MATCH=$(grep -o -i -f <(cut -d "|" -f1 "$RULES") <<<"$URL")
  # If there's a match, try to set the browser name
  if [[ -n "$MATCH" ]]; then
    # If there's multiple rules for the same URL, use the last one
    BROWSER=$(awk -F'[|]' '$1=="'"${MATCH}"'"{print $2}' "$RULES" | tail -1)
  fi
fi

# If there's no rule for provided URL, display browser chooser dialog
if [[ -z $BROWSER ]]; then
  BROWSER=$(
    yad \
      --title="Open URL with" \
      --list \
      --borders=25 \
      --width=300 \
      --height=300 \
      --buttons-layout=center \
      --button=gtk-cancel:1 \
      --button="Remember!bookmark_add":20 \
      --button=gtk-ok:0 \
      --center \
      --fixed \
      --on-top \
      --separator="" \
      --column="" \
      --no-headers \
      "Chrome" \
      "Firefox" \
      "Brave" \
      "Chrome Incognito" \
      "Firefox Incognito" \
      "Brave Incognito"
  )

  # Save yad exit code for later use
  retval=$?

  # Exit if "Cancel" button was pressed
  if [[ -z "$BROWSER" ]]; then
    exit 0
  fi

  # Remember choice
  # If yad exit code is "20", then "Remember" button was pressed
  if [[ $retval -eq 20 ]]; then
    # Optionally modify the URL to remember the choice for
    REMEMBER=$(
      yad \
        --title="Edit URL to remember choice for" \
        --center \
        --fixed \
        --on-top \
        --entry \
        --entry-text="$URL" \
        --button=gtk-cancel:1 \
        --button=gtk-ok:0 \
        --width 600
    ) || exit 0 # Exit if "Cancel" button was pressed
    # Save choice
    echo "${REMEMBER}|${BROWSER}" >>"$RULES"
  fi

fi

# Set browser command depending on the browser name
browse() {
  local BROWSER="$1"
  local URL="$2"
  case "$BROWSER" in
    "Chrome") command google-chrome --profile-directory="Default" "$URL" &>/dev/null & disown ;;
    "Firefox") command firefox "$URL" &>/dev/null 2>&1 & disown ;;
    "Brave") command brave-browser-stable "$URL" &>/dev/null 2>&1 & disown ;;
    "Chrome Incognito") command google-chrome --incognito --profile-directory="Default" "$URL" &>/dev/null 2>&1 & disown ;;
    "Firefox Incognito") command firefox -private-window "$URL" &>/dev/null 2>&1 & disown ;;
    "Brave Incognito") command brave-browser-stable --incognito "$URL" &>/dev/null 2>&1 & disown ;;
    *) ;;
  esac
}
# Execute browse() function or display function call on the screen if "--dry-run" arg was provided
"${CMD[@]}" browse "$BROWSER" "$URL"

Setup instructions

Put browser-chooser.sh somewhere in PATH, eg: ~/bin
Set browser-chooser.desktop as the default browser application

cp browser-chooser.desktop "${HOME}/.local/share/applications/"
xdg-mime default browser-chooser.desktop x-scheme-handler/http
xdg-mime default browser-chooser.desktop x-scheme-handler/https