fix: make "People and body" category work in Firefox content script (#357)

Co-authored-by: Nolan Lawson <nolan@nolanlawson.com>

src/database/utils/cleanEmoji.js

@@ -4,6 +4,11 @@ export function cleanEmoji (emoji) {
   if (!emoji) {
     return emoji
   }
+  // if inside a Firefox content script, need to clone the emoji object to prevent Firefox from complaining about cross-origin object
+  /* istanbul ignore if */
+  if (typeof wrappedJSObject !== 'undefined') {
+    emoji = structuredClone(emoji)
+  }
   delete emoji.tokens
   if (emoji.skinTones) {
     const len = emoji.skinTones.length