diff --git a/js/mzta-chatgpt.js b/js/mzta-chatgpt.js
index 8f381910..41037e7b 100644
--- a/js/mzta-chatgpt.js
+++ b/js/mzta-chatgpt.js
@@ -1,3 +1,22 @@
+/*
+ *  ThunderAI [https://micz.it/thunderdbird-addon-thunderai/]
+ *  Copyright (C) 2024  Mic (m@micz.it)
+
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
 // Original methods derived from https://github.com/KudoAI/chatgpt.js/blob/7eb8463cd61143fa9e1d5a8ec3c14d3c1b286e54/chatgpt.js
 // Using a full string to inject it in the ChatGPT page to avoid any security error
 
diff --git a/js/mzta-compose-script.js b/js/mzta-compose-script.js
index ab4ec110..36def3d2 100644
--- a/js/mzta-compose-script.js
+++ b/js/mzta-compose-script.js
@@ -1,6 +1,23 @@
-// Modified version derived from https://github.com/ali-raheem/Aify/blob/13ff87583bc520fb80f555ab90a90c5c9df797a7/plugin/content_scripts/compose.js
+/*
+ *  ThunderAI [https://micz.it/thunderdbird-addon-thunderai/]
+ *  Copyright (C) 2024  Mic (m@micz.it)
 
-//console.log('mzta-compose-script.js');
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+// Modified version derived from https://github.com/ali-raheem/Aify/blob/13ff87583bc520fb80f555ab90a90c5c9df797a7/plugin/content_scripts/compose.js
 
 const makeParagraphs = (text, func) => {
   const chunks = text.split(/\n{2,}/);
diff --git a/js/mzta-prompts.js b/js/mzta-prompts.js
index 5c54d97f..03c5f31f 100644
--- a/js/mzta-prompts.js
+++ b/js/mzta-prompts.js
@@ -1,3 +1,21 @@
+/*
+ *  ThunderAI [https://micz.it/thunderdbird-addon-thunderai/]
+ *  Copyright (C) 2024  Mic (m@micz.it)
+
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 // Modified version derived from https://github.com/ali-raheem/Aify/blob/13ff87583bc520fb80f555ab90a90c5c9df797a7/plugin/html/globals.js
 
 /*  Types (type attribute):
diff --git a/js/mzta-utils.js b/js/mzta-utils.js
index bb483198..ac3d6c0b 100644
--- a/js/mzta-utils.js
+++ b/js/mzta-utils.js
@@ -1,3 +1,22 @@
+/*
+ *  ThunderAI [https://micz.it/thunderdbird-addon-thunderai/]
+ *  Copyright (C) 2024  Mic (m@micz.it)
+
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
 export function getLanguageDisplayName(languageCode) {
     const languageDisplay = new Intl.DisplayNames([languageCode], {type: 'language'});
     let lang_string = languageDisplay.of(languageCode);
diff --git a/messageMenu/mzta-msgmenu.js b/messageMenu/mzta-msgmenu.js
index 80b11f2c..d4537c84 100644
--- a/messageMenu/mzta-msgmenu.js
+++ b/messageMenu/mzta-msgmenu.js
@@ -1,3 +1,22 @@
+/*
+ *  ThunderAI [https://micz.it/thunderdbird-addon-thunderai/]
+ *  Copyright (C) 2024  Mic (m@micz.it)
+
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
 // Modified version derived from https://github.com/ali-raheem/Aify/blob/cfadf52f576b7be3720b5b73af7c8d3129c054da/plugin/html/actions.js
 
 import { defaultPrompts } from '../js/mzta-prompts.js';
diff --git a/mzta-background.js b/mzta-background.js
index 6d34cc9a..653b15e0 100644
--- a/mzta-background.js
+++ b/mzta-background.js
@@ -1,3 +1,21 @@
+/*
+ *  ThunderAI [https://micz.it/thunderdbird-addon-thunderai/]
+ *  Copyright (C) 2024  Mic (m@micz.it)
+
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 import { mzta_script } from './js/mzta-chatgpt.js';
 import { prefs_default } from './options/mzta-options-default.js';
 
diff --git a/options/mzta-options-default.js b/options/mzta-options-default.js
index 9f9aa5f1..66c41624 100644
--- a/options/mzta-options-default.js
+++ b/options/mzta-options-default.js
@@ -1,3 +1,21 @@
+/*
+ *  ThunderAI [https://micz.it/thunderdbird-addon-thunderai/]
+ *  Copyright (C) 2024  Mic (m@micz.it)
+
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 export const prefs_default = {
     chatgpt_win_height: 800,
     chatgpt_win_width: 700,
diff --git a/options/mzta-options.js b/options/mzta-options.js
index ac1ede31..1d443b30 100644
--- a/options/mzta-options.js
+++ b/options/mzta-options.js
@@ -1,3 +1,22 @@
+/*
+ *  ThunderAI [https://micz.it/thunderdbird-addon-thunderai/]
+ *  Copyright (C) 2024  Mic (m@micz.it)
+
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
 import { prefs_default } from './mzta-options-default.js';
 import { getLanguageDisplayName } from '../js/mzta-utils.js'
 
diff --git a/options/mzta-release-notes.js b/options/mzta-release-notes.js
index 608f6f13..40ffb724 100644
--- a/options/mzta-release-notes.js
+++ b/options/mzta-release-notes.js
@@ -1,3 +1,21 @@
+/*
+ *  ThunderAI [https://micz.it/thunderdbird-addon-thunderai/]
+ *  Copyright (C) 2024  Mic (m@micz.it)
+
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 document.addEventListener('DOMContentLoaded', () => {
   i18n.updateDocument();
 }, { once: true });