diff --git a/.changes/unreleased/Fixed-20251211-135111.yaml b/.changes/unreleased/Fixed-20251211-135111.yaml
new file mode 100644
index 000000000..0a179d649
--- /dev/null
+++ b/.changes/unreleased/Fixed-20251211-135111.yaml
@@ -0,0 +1,6 @@
+kind: Fixed
+body: Tentatively fix usage of CTRL+C in collabora editor with chrome / edge browser
+time: 2025-12-11T13:51:11.425545012+01:00
+custom:
+    Issue: "483"
+    SchemaChange: No schema change
diff --git a/config/bundles.php b/config/bundles.php
index 989338f3e..72b5e22f5 100644
--- a/config/bundles.php
+++ b/config/bundles.php
@@ -37,5 +37,4 @@ return [
     Symfony\Bundle\WebProfilerBundle\WebProfilerBundle::class => ['dev' => true, 'test' => true],
     Symfony\UX\Translator\UxTranslatorBundle::class => ['all' => true],
     loophp\PsrHttpMessageBridgeBundle\PsrHttpMessageBridgeBundle::class => ['all' => true],
-    Chill\ZimbraBundle\ChillZimbraBundle::class => ['all' => true],
 ];
diff --git a/config/services.yaml b/config/services.yaml
index 11c095d99..037b57f6d 100644
--- a/config/services.yaml
+++ b/config/services.yaml
@@ -11,3 +11,6 @@ services:
         autowire: true      # Automatically injects dependencies in your services.
         autoconfigure: true # Automatically registers your services as commands, event subscribers, etc.
 
+when@dev:
+    services:
+        ChampsLibres\WopiLib\Contract\Service\ProofValidatorInterface: '@Chill\WopiBundle\Service\Wopi\NullProofValidator'
diff --git a/phpstan.dist.neon b/phpstan.dist.neon
index 38c3f7b61..60c36771e 100644
--- a/phpstan.dist.neon
+++ b/phpstan.dist.neon
@@ -3,7 +3,6 @@ parameters:
     paths:
         - src/
         - utils/
-        - packages/
     tmpDir: var/cache/phpstan
     reportUnmatchedIgnoredErrors: false
     excludePaths:
diff --git a/src/Bundle/ChillWopiBundle/chill.webpack.config.js b/src/Bundle/ChillWopiBundle/chill.webpack.config.js
index 05c231f68..8580597cc 100644
--- a/src/Bundle/ChillWopiBundle/chill.webpack.config.js
+++ b/src/Bundle/ChillWopiBundle/chill.webpack.config.js
@@ -2,7 +2,7 @@
 module.exports = function (encore, entries) {
   encore.addEntry(
     "page_wopi_editor",
-    __dirname + "/src/Resources/public/page/editor/index.js",
+    __dirname + "/src/Resources/public/page/editor/index.ts",
   );
   encore.addEntry(
     "mod_reload_page",
diff --git a/src/Bundle/ChillWopiBundle/src/Resources/public/page/editor/index.js b/src/Bundle/ChillWopiBundle/src/Resources/public/page/editor/index.js
deleted file mode 100644
index d946977df..000000000
--- a/src/Bundle/ChillWopiBundle/src/Resources/public/page/editor/index.js
+++ /dev/null
@@ -1,46 +0,0 @@
-require("./index.scss");
-
-window.addEventListener("DOMContentLoaded", function () {
-  let frameholder = document.getElementById("frameholder");
-  let office_frame = document.createElement("iframe");
-  office_frame.name = "office_frame";
-  office_frame.id = "office_frame";
-
-  // The title should be set for accessibility
-  office_frame.title = "Office Frame";
-
-  // This attribute allows true fullscreen mode in slideshow view
-  // when using PowerPoint's 'view' action.
-  office_frame.setAttribute("allowfullscreen", "true");
-
-  // The sandbox attribute is needed to allow automatic redirection to the O365 sign-in page in the business user flow
-  office_frame.setAttribute(
-    "sandbox",
-    "allow-downloads allow-scripts allow-same-origin allow-forms allow-modals allow-popups allow-top-navigation allow-popups-to-escape-sandbox",
-  );
-  frameholder.appendChild(office_frame);
-
-  document.getElementById("office_form").submit();
-
-  const url = new URL(editor_url);
-  const editor_domain = url.origin;
-
-  window.addEventListener("message", function (message) {
-    if (message.origin !== editor_domain) {
-      return;
-    }
-
-    let data = JSON.parse(message.data);
-
-    if ("UI_Close" === data.MessageId) {
-      closeEditor();
-    }
-  });
-});
-
-function closeEditor() {
-  let params = new URLSearchParams(window.location.search),
-    returnPath = params.get("returnPath");
-
-  window.location.assign(returnPath);
-}
diff --git a/src/Bundle/ChillWopiBundle/src/Resources/public/page/editor/index.ts b/src/Bundle/ChillWopiBundle/src/Resources/public/page/editor/index.ts
new file mode 100644
index 000000000..01ddad995
--- /dev/null
+++ b/src/Bundle/ChillWopiBundle/src/Resources/public/page/editor/index.ts
@@ -0,0 +1,68 @@
+import "./index.scss";
+
+// Provided by the server-side template
+declare const editor_url: string;
+
+window.addEventListener("DOMContentLoaded", function () {
+    const frameholder = document.getElementById("frameholder");
+    const office_frame = document.createElement("iframe");
+    office_frame.name = "office_frame";
+    office_frame.id = "office_frame";
+
+    // The title should be set for accessibility
+    office_frame.title = "Office Frame";
+
+    // This attribute allows true fullscreen mode in slideshow view
+    // when using PowerPoint's 'view' action.
+    office_frame.setAttribute("allowfullscreen", "true");
+
+    // The sandbox attribute is needed to allow automatic redirection to the O365 sign-in page in the business user flow
+    office_frame.setAttribute(
+        "sandbox",
+        "allow-downloads allow-scripts allow-same-origin allow-forms allow-modals allow-popups allow-top-navigation allow-popups-to-escape-sandbox",
+    );
+
+    office_frame.setAttribute(
+        "allow",
+        "clipboard-read *; clipboard-write *; fullscreen *",
+    );
+    if (frameholder) {
+        frameholder.appendChild(office_frame);
+    }
+
+    const officeForm = document.getElementById(
+        "office_form",
+    ) as HTMLFormElement | null;
+    officeForm?.submit();
+
+    const url = new URL(editor_url);
+    const editor_domain = url.origin;
+
+    window.addEventListener("message", function (message: MessageEvent) {
+        if (message.origin !== editor_domain) {
+            return;
+        }
+
+        let data: { MessageId: "UI_Close" | null; data: string };
+        try {
+            data =
+                typeof message.data === "string"
+                    ? JSON.parse(message.data)
+                    : message.data;
+        } catch (e: unknown) {
+            console.error("error while parsing data from message UI_CLOSE", e);
+            return;
+        }
+
+        if ("UI_Close" === data.MessageId) {
+            closeEditor();
+        }
+    });
+});
+
+function closeEditor(): void {
+    const params = new URLSearchParams(window.location.search);
+    const returnPath = params.get("returnPath") ?? "/";
+
+    window.location.assign(returnPath);
+}
diff --git a/symfony.lock b/symfony.lock
index 5724d23b9..532c9ec98 100644
--- a/symfony.lock
+++ b/symfony.lock
@@ -2,9 +2,6 @@
     "champs-libres/wopi-bundle": {
         "version": "dev-master"
     },
-    "chill-project/chill-zimbra-bundle": {
-        "version": "dev-472-zimbra-connector"
-    },
     "doctrine/annotations": {
         "version": "1.14",
         "recipe": {