diff --git a/.local/bin/browser_bookmarks.sh b/.local/bin/browser_bookmarks.sh
index 3cc3c47f..1199ecb6 100644
--- a/.local/bin/browser_bookmarks.sh
+++ b/.local/bin/browser_bookmarks.sh
@@ -1,117 +1,120 @@
 #!/bin/dash
 
-URLQUERY_FILE="$HOME/.local/share/urlquery"
-CLIPBOARD="xclip -o"
-ACTION_MENU='@@'
+URLQUERY_FILE="${HOME}/.local/share/urlquery"
+ACTION_MENU="@@"
 
-# For additional search function, see information on open_bookmark function below 
+# For additional search function, see information on open_bookmark function below
+
+CLIPBOARD() {
+        xclip -o
+}
 
 DMENU() {
-    dmenu -i -l $1 -p "$2"
+        dmenu -i -l "${1}" -p "${2}"
 }
 
 error_notify() {
-    notify-send "$1"
-    exit 1
+        notify-send "${1}"
+        exit "1"
 }
 
 ensure_file_exists() {
-    [ -f "$URLQUERY_FILE" ] || {
-        notify-send "$URLQUERY_FILE does not exist. Creating it now."
-        echo "SearXNG=https://searx.tiekoetter.com/search?q=" > "$URLQUERY_FILE"
-    }
+        [ -f "${URLQUERY_FILE}" ] || {
+                notify-send "${URLQUERY_FILE} does not exist. Creating it now."
+                echo "SearXNG=https://searx.tiekoetter.com/search?q=" > "${URLQUERY_FILE}"
+        }
 }
 
 get_selection() {
-    cut -d= -f1 "$URLQUERY_FILE" | DMENU $LINE_COUNT "Bookmarks"
+        cut -d= -f1 "${URLQUERY_FILE}" | DMENU "${LINE_COUNT}" "Bookmarks"
 }
 
 update_file() {
-    pattern="$1"
-    replacement="$2"
-    sed "/$pattern/c\\
-$replacement" "$URLQUERY_FILE" > "$URLQUERY_FILE.tmp" && mv "$URLQUERY_FILE.tmp" "$URLQUERY_FILE" ||
-	error_notify "Failed to update the file."
+        pattern="${1}"
+        replacement="${2}"
+        sed "/${pattern}/c\\
+${replacement}" "${URLQUERY_FILE}" > "${URLQUERY_FILE}.tmp" && mv "${URLQUERY_FILE}.tmp" "${URLQUERY_FILE}" ||
+                error_notify "Failed to update the file."
 }
 
 is_valid_url() {
-    echo "$1" | grep -qE "^https?://[^[:space:]/?#][^[:space:]]+$"
+        echo "${1}" | grep -qE "^https?://[^[:space:]/?#][^[:space:]]+$"
 }
 
 add_bookmark() {
-    URL=$($CLIPBOARD)
-    is_valid_url "$URL" || error_notify "The clipboard content is not a valid URL."
-    grep -q "=$URL$" "$URLQUERY_FILE" && notify-send "The URL is already in the list." && return
-    NAME=$(echo "" | DMENU 0 "Name")
-    [ -n "$NAME" ] && echo "${NAME}=${URL}" >> "$URLQUERY_FILE" && notify-send "'$NAME' is bookmarked."
+        URL="$(CLIPBOARD)"
+        is_valid_url "${URL}" || error_notify "The clipboard content is not a valid URL."
+        grep -q "=${URL}$" "${URLQUERY_FILE}" && notify-send "The URL is already in the list." && return
+        NAME="$(echo "" | DMENU "0" "Name")"
+        [ -n "${NAME}" ] && echo "${NAME}=${URL}" >> "${URLQUERY_FILE}" && notify-send "'${NAME}' is bookmarked."
 }
 
 delete_bookmark() {
-    NAME=$(get_selection)
-    [ -z "$NAME" ] && error_notify "Failed to delete the bookmark." && return
-    sed "/^$NAME=/d" "$URLQUERY_FILE" > "$URLQUERY_FILE.tmp"
-    mv "$URLQUERY_FILE.tmp" "$URLQUERY_FILE"
-    [ ! -s "$URLQUERY_FILE" ] || ! grep -qE "\S" "$URLQUERY_FILE" && rm "$URLQUERY_FILE"
-    notify-send "'$NAME' is deleted."
+        NAME="$(get_selection)"
+        [ -z "${NAME}" ] && error_notify "Failed to delete the bookmark." && return
+        sed "/^${NAME}=/d" "${URLQUERY_FILE}" > "${URLQUERY_FILE}.tmp"
+        mv "${URLQUERY_FILE}.tmp" "${URLQUERY_FILE}"
+        [ ! -s "${URLQUERY_FILE}" ] || ! grep -qE "\S" "${URLQUERY_FILE}" && rm "${URLQUERY_FILE}"
+        notify-send "'${NAME}' is deleted."
 }
 
 edit_name() {
-    OLD_NAME="$1"
-    NEW_NAME=$(echo "" | DMENU 0 "New Name")
-    [ -z "$NEW_NAME" ] && return
-    URL=$(grep "^$OLD_NAME=" "$URLQUERY_FILE" | cut -d= -f2)
-    update_file "^$OLD_NAME=" "$NEW_NAME=$URL"
+        OLD_NAME="${1}"
+        NEW_NAME="$(echo "" | DMENU "0" "New Name")"
+        [ -z "${NEW_NAME}" ] && return
+        URL="$(grep "^${OLD_NAME}=" "${URLQUERY_FILE}" | cut -d= -f2)"
+        update_file "^${OLD_NAME}=" "${NEW_NAME}=${URL}"
 }
 
 edit_url() {
-    NAME="$1"
-    NEW_URL=$(echo "" | DMENU 0 "New URL")
-    [ -z "$NEW_URL" ] && return
-    update_file "^$NAME=.*" "$NAME=$NEW_URL"
+        NAME="${1}"
+        NEW_URL="$(echo "" | DMENU "0" "New URL")"
+        [ -z "${NEW_URL}" ] && return
+        update_file "^${NAME}=.*" "${NAME}=${NEW_URL}"
 }
 
 edit_bookmark() {
-    NAME=$(get_selection)
-    [ -z "$NAME" ] && error_notify "Failed to edit the bookmark." && return
-    FIELD=$(echo "Name\nURL" | DMENU 2 "Edit")
-    case "$FIELD" in
-    "Name") edit_name "$NAME" ;;
-    "URL") edit_url "$NAME" ;;
-    esac
-    notify-send "'$NAME' is updated."
+        NAME="$(get_selection)"
+        [ -z "${NAME}" ] && error_notify "Failed to edit the bookmark." && return
+        FIELD="$(echo "Name\nURL" | DMENU "2" "Edit")"
+        case "${FIELD}" in
+                "Name") edit_name "${NAME}" ;;
+                "URL") edit_url "${NAME}" ;;
+        esac
+        notify-send "'${NAME}' is updated."
 }
 
 open_bookmark() {
-    URL=$(grep "^$SELECTION=" "$URLQUERY_FILE" | cut -d= -f2-)
-    [ -z "$URL" ] && notify-send "Bookmark not found." && exit 1
-    case "$URL" in
-    *"search"*|*"wiki"*|*"packages"*) # Add your additional search keywords here similarly.
-        QUERY=$(echo "" | DMENU 0 "Search")
-        URL="${URL}${QUERY}"
-        ;;
-    esac
-    $BROWSER "$URL" || notify-send "Failed to open the URL."
+        URL="$(grep "^${SELECTION}=" "${URLQUERY_FILE}" | cut -d= -f2-)"
+        [ -z "${URL}" ] && notify-send "Bookmark not found." && exit "1"
+        case "${URL}" in
+                *"search"* | *"wiki"* | *"packages"*) # Add your additional search keywords here similarly.
+                        QUERY="$(echo "" | DMENU "0" "Search")"
+                        URL="${URL}${QUERY}"
+                        ;;
+        esac
+        "${BROWSER}" "${URL}" || notify-send "Failed to open the URL."
 }
 
 ensure_file_exists
 
-LINE_COUNT=$(wc -l < "$URLQUERY_FILE")
+LINE_COUNT="$(wc -l < "${URLQUERY_FILE}")"
 
-[ "$LINE_COUNT" -ge "15" ] && LINE_COUNT="15"
+[ "${LINE_COUNT}" -ge "15" ] && LINE_COUNT="15"
 
-SELECTION=$(get_selection)
-[ -z "$SELECTION" ] && exit
+SELECTION="$(get_selection)"
+[ -z "${SELECTION}" ] && exit
 
-case "$SELECTION" in
-"$ACTION_MENU")
-    ACTION=$(echo "Add\nDelete\nEdit" | DMENU 3 "Action")
-    case "$ACTION" in
-    "Add") add_bookmark ;;
-    "Delete") delete_bookmark ;;
-    "Edit") edit_bookmark ;;
-    esac
-    ;;
-*)
-    open_bookmark
-    ;;
+case "${SELECTION}" in
+        "${ACTION_MENU}")
+                ACTION="$(echo "Add\nDelete\nEdit" | DMENU "3" "Action")"
+                case "${ACTION}" in
+                        "Add") add_bookmark ;;
+                        "Delete") delete_bookmark ;;
+                        "Edit") edit_bookmark ;;
+                esac
+                ;;
+        *)
+                open_bookmark
+                ;;
 esac