diff --git a/js/tb115_segmenter/tb115_loader.js b/js/tb115_segmenter/tb115_loader.js
deleted file mode 100644
index df476c7c..00000000
--- a/js/tb115_segmenter/tb115_loader.js
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- *  ThunderAI [https://micz.it/thunderbird-addon-thunderai/]
- *  Copyright (C) 2024 - 2026  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/>.
- */
-// Firefox 115 and, consequently, Thunderbird 115 are not compatible with Intl.Segmenter.
-// ChatGPT is using Intl.Segmenter, so we have to do something about it or it won't work...
-
-// console.log("[ThunderAI] Intl.Segmenter: " + Intl.Segmenter);
-
-(function() {
-    if('Segmenter' in Intl){
-        // console.log('[ThunderAI] TB128+ detected. Intl.Segmenter is already supported.');
-        return;
-    }
-    // Creates a <script> element to inject polyfill.js into the page context
-    const script = document.createElement('script');
-    script.src = browser.runtime.getURL('js/tb115_segmenter/tb115_polyfill.js');
-    script.onload = function() {
-        // Remove the script once loaded for cleanup
-        this.remove();
-    };
-    script.onerror = function() {
-        console.error('[ThunderAI] Error loading Intl.Segmenter polyfill.');
-    };
-    (document.head || document.documentElement).appendChild(script);
-})();
-
-
-
-async function isThunderbird128OrGreater(){
-    try {
-      const info = await browser.runtime.getBrowserInfo();
-      const version = info.version;
-      return compareThunderbirdVersions(version, '128.0') >= 0;
-    } catch (error) {
-      console.error('[ThunderAI] Error retrieving browser information:', error);
-      return false;
-    }
-  }
-  
-  function compareThunderbirdVersions(v1, v2) {
-    const v1parts = v1.split('.').map(Number);
-    const v2parts = v2.split('.').map(Number);
-  
-    for (let i = 0; i < Math.max(v1parts.length, v2parts.length); i++) {
-      const v1part = v1parts[i] || 0;
-      const v2part = v2parts[i] || 0;
-      if (v1part > v2part) return 1;
-      if (v1part < v2part) return -1;
-    }
-    return 0;
-  }
\ No newline at end of file
diff --git a/js/tb115_segmenter/tb115_polyfill.js b/js/tb115_segmenter/tb115_polyfill.js
deleted file mode 100644
index 6760cd9a..00000000
--- a/js/tb115_segmenter/tb115_polyfill.js
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- *  ThunderAI [https://micz.it/thunderbird-addon-thunderai/]
- *  Copyright (C) 2024 - 2026  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/>.
- */
-// Firefox 115 and, consequently, Thunderbird 115 are not compatible with Intl.Segmenter.
-// ChatGPT is using Intl.Segmenter, so we have to do something about it or it won't work...
-
-(function() {
-    if (!('Segmenter' in Intl)) {
-        class Segmenter {
-            constructor(locale = 'en', options = { granularity: 'grapheme' }) {
-                this.locale = locale;
-                this.granularity = options.granularity || 'grapheme';
-            }
-
-            segment(text) {
-                switch (this.granularity) {
-                    case 'word':
-                        return text.split(/\s+/).filter(word => word.length > 0).map(word => ({ segment: word }));
-                    case 'grapheme':
-                        return Array.from(text).map(char => ({ segment: char }));
-                    case 'sentence':
-                        return text.split(/(?<=[.!?])\s+/).map(sentence => ({ segment: sentence }));
-                    default:
-                        return [{ segment: text }];
-                }
-            }
-        }
-
-        Intl.Segmenter = Segmenter;
-        // console.log('Intl.Segmenter polyfill correctly loaded.');
-    }
-    // else {
-    //     console.log('Intl.Segmenter is already supported.');
-    // }
-})();
diff --git a/manifest.json b/manifest.json
index 8014a58a..eb7c408e 100644
--- a/manifest.json
+++ b/manifest.json
@@ -65,7 +65,7 @@
     "content_scripts": [
         {
             "matches": ["https://*.chatgpt.com/*"],
-            "js": ["js/tb115_segmenter/tb115_loader.js","js/lib/diff.js"],
+            "js": ["js/lib/diff.js"],
             "all_frames": true,
             "run_at": "document_start"
         }