diff --git a/css/enhancedsteam.css b/css/enhancedsteam.css
index 5d215beb2..8b1adae70 100644
--- a/css/enhancedsteam.css
+++ b/css/enhancedsteam.css
@@ -1280,6 +1280,98 @@ input[type=checkbox].es_dlc_selection:checked + label {
 	opacity: 0.4;
 }
 
+/***************************************
+ * App pages
+ * addFullscreenScreenshotView()
+ **************************************/
+.es_screenshot_fullscreen_toggle {
+	position: absolute;
+	right: 18%;
+	bottom: 0;
+}
+.es_screenshot_fullscreen_toggle i {
+	display: block;
+	background-image: url('data:image/gif;base64,R0lGODlhEAAgAIABAP///////yH5BAEAAAEALAAAAAAQACAAAAJAjH+gC+jB1HNxpmqjnHVz31iQOIoh5D0Spmom+y0kypDaOWf2hVMNjLi9asNUTFZECpO9FjIDDLqOvyYvscsVAAA7');
+	background-position: top left;
+	width: 16px;
+	height: 16px;
+	margin: 5px;
+}
+.es_screenshot_download_btn {
+	position: absolute;
+	right: 24%;
+	bottom: 0;
+}
+.es_screenshot_download_btn i {
+	display: block;
+	background-image: url(https://steamcommunity-a.akamaihd.net/public/shared/images/header/btn_header_installsteam_download.png?v=1);
+	background-position: center;
+	background-repeat: no-repeat;
+	width: 16px;
+	height: 16px;
+	margin: 5px;
+}
+.screenshot_popup_modal_content:fullscreen .es_screenshot_fullscreen_toggle i {
+	background-position: bottom left;
+}
+.screenshot_popup_modal_content:fullscreen {
+	padding: 0;
+	background: none;
+}
+.screenshot_popup_modal_content .screenshot_popup_modal_title {
+	display: none;
+}
+.screenshot_popup_modal_content:fullscreen .screenshot_img_ctn {
+	width: 100%;
+	height: 100%;
+}
+.screenshot_popup_modal_content:fullscreen .screenshot_img_ctn > img {
+	max-width: 100% !important;
+	max-height: 100% !important;
+	object-fit: scale-down;
+	width: 100%;
+	height: 100%;
+}
+.screenshot_popup_modal_content:fullscreen .screenshot_popup_modal_footer {
+	position: absolute;
+	width: 100%;
+	bottom: 0;
+	overflow: visible;
+}
+.screenshot_popup_modal_content:fullscreen .screenshot_popup_modal_footer > .btn_medium {
+	opacity: 0;
+	transition: opacity 0.25s ease-in-out;
+}
+.screenshot_popup_modal_content:fullscreen .screenshot_popup_modal_footer:hover > .btn_medium {
+	opacity: 1;
+}
+.screenshot_popup_modal_content:fullscreen .screenshot_popup_modal_footer > div:first-child {
+	display: inline-block;
+	background: rgba(103, 193, 245, 0.2);
+	border-radius: 100px;
+	padding: 0 1em;
+}
+.screenshot_popup_modal_content:fullscreen .screenshot_popup_modal_footer > .previous::before {
+	content: '';
+	position: absolute;
+	left: 0;
+	bottom: 0;
+	width: 40vw;
+	height: 100vh;
+}
+@keyframes es_screenshot_popup_modal_hook {
+	from {
+		opacity: 0.99;
+	}
+	to {
+		opacity: 1;
+	}
+}
+.screenshot_popup_modal {
+	animation-duration: 0.001s;
+	animation-name: es_screenshot_popup_modal_hook;
+}
+
 /***************************************
  * Store and Community
  * add_language_warning(),
diff --git a/js/content/store.js b/js/content/store.js
index 6fc88ae64..60b671a32 100644
--- a/js/content/store.js
+++ b/js/content/store.js
@@ -566,6 +566,7 @@ class AppPageClass extends StorePageClass {
         this.addWishlistRemove();
         this.addUserNote();
         this.addNewQueueButton();
+        this.addFullscreenScreenshotView();
 
         this.addCoupon();
         this.addPrices();
@@ -912,6 +913,44 @@ class AppPageClass extends StorePageClass {
         });
     }
 
+    addFullscreenScreenshotView() {
+        function toggleFullScreen(event) {
+            if (!document.fullscreenElement) {
+                let element = event.target.closest(".screenshot_popup_modal_content");
+                element.requestFullscreen();
+            } else {
+                document.exitFullscreen();
+            }
+        }
+
+        function initFSVButtons(event) {
+            if (event.animationName !== "es_screenshot_popup_modal_hook") return;
+
+            let modalFooter = document.querySelector(".screenshot_popup_modal_footer");
+            let nextButton = modalFooter.querySelector(".next");
+            let nextButtonOffsetWidth = nextButton.offsetWidth;
+            if (nextButton.style.display === "none") {
+                nextButton.style.display = "";
+                nextButtonOffsetWidth = nextButton.offsetWidth;
+                nextButton.style.display = "none";
+            }
+            HTML.beforeEnd(modalFooter,
+                `<div class="btnv6_blue_hoverfade btn_medium es_screenshot_fullscreen_toggle" style="right: calc(${nextButtonOffsetWidth}px + 0.5em)"><i></i></div>`);
+            let fsvButton = modalFooter.querySelector(".es_screenshot_fullscreen_toggle");
+            fsvButton.addEventListener("click", toggleFullScreen);
+
+            let modalTitleLink = modalFooter.parentElement.querySelector(".screenshot_popup_modal_title > a");
+            HTML.beforeEnd(modalFooter,
+                `<div class="btnv6_blue_hoverfade btn_medium es_screenshot_download_btn" style="right: calc(${nextButtonOffsetWidth + fsvButton.offsetWidth}px + 1em)" title="${modalTitleLink.textContent.trim()}"><i></i></div>`);
+            let downloadButton = modalFooter.querySelector(".es_screenshot_download_btn");
+            downloadButton.addEventListener("click", () => {
+                modalTitleLink.click();
+            });
+        }
+
+        document.addEventListener("animationstart", initFSVButtons);
+    }
+
     getFirstSubid() {
         let node = document.querySelector("div.game_area_purchase_game input[name=subid]");
         return node && node.value;