8 files changed, 8 insertions, 0 deletions
diff --git a/ext/fg/js/document.js b/ext/fg/js/document.js
index 71654b29..7284cdd1 100644
--- a/ext/fg/js/document.js
+++ b/ext/fg/js/document.js
@@ -16,6 +16,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+/*global TextSourceElement, TextSourceRange, DOM*/
 
 const REGEX_TRANSPARENT_COLOR = /rgba\s*\([^)]*,\s*0(?:\.0+)?\s*\)/;
 
diff --git a/ext/fg/js/float.js b/ext/fg/js/float.js
index 8d61d8f6..d31b8336 100644
--- a/ext/fg/js/float.js
+++ b/ext/fg/js/float.js
@@ -16,6 +16,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+/*global popupNestedInitialize, Display*/
 
 class DisplayFloat extends Display {
     constructor() {
diff --git a/ext/fg/js/frontend-initialize.js b/ext/fg/js/frontend-initialize.js
index 9c923fea..c32e97d4 100644
--- a/ext/fg/js/frontend-initialize.js
+++ b/ext/fg/js/frontend-initialize.js
@@ -16,6 +16,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+/*global PopupProxyHost, PopupProxy, Frontend*/
 
 async function main() {
     const data = window.frontendInitializationData || {};
diff --git a/ext/fg/js/frontend.js b/ext/fg/js/frontend.js
index 2286bf19..3611d44e 100644
--- a/ext/fg/js/frontend.js
+++ b/ext/fg/js/frontend.js
@@ -16,6 +16,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+/*global apiGetZoom, apiOptionsGet, apiTermsFind, apiKanjiFind, docSentenceExtract, TextScanner*/
 
 class Frontend extends TextScanner {
     constructor(popup, ignoreNodes) {
diff --git a/ext/fg/js/popup-nested.js b/ext/fg/js/popup-nested.js
index 3f3c945e..3e5f5b80 100644
--- a/ext/fg/js/popup-nested.js
+++ b/ext/fg/js/popup-nested.js
@@ -16,6 +16,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+/*global apiOptionsGet*/
 
 let popupNestedInitialized = false;
 
diff --git a/ext/fg/js/popup-proxy-host.js b/ext/fg/js/popup-proxy-host.js
index 427172c6..98729796 100644
--- a/ext/fg/js/popup-proxy-host.js
+++ b/ext/fg/js/popup-proxy-host.js
@@ -16,6 +16,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+/*global apiFrameInformationGet, FrontendApiReceiver, Popup*/
 
 class PopupProxyHost {
     constructor() {
diff --git a/ext/fg/js/popup-proxy.js b/ext/fg/js/popup-proxy.js
index 63aa6bbe..db6dffb1 100644
--- a/ext/fg/js/popup-proxy.js
+++ b/ext/fg/js/popup-proxy.js
@@ -16,6 +16,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+/*global FrontendApiSender*/
 
 class PopupProxy {
     constructor(depth, parentId, parentFrameId, url) {
diff --git a/ext/fg/js/popup.js b/ext/fg/js/popup.js
index e7dae93e..0b142dda 100644
--- a/ext/fg/js/popup.js
+++ b/ext/fg/js/popup.js
@@ -16,6 +16,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+/*global apiInjectStylesheet*/
 
 class Popup {
     constructor(id, depth, frameIdPromise) {