diff --git a/src/display/api.js b/src/display/api.js
index e89807ac0e6eb..2c09555563879 100644
--- a/src/display/api.js
+++ b/src/display/api.js
@@ -1502,12 +1502,9 @@ class PDFPageProxy {
     optionalContentConfigPromise ||=
       this._transport.getOptionalContentConfig(renderingIntent);
 
-    let intentState = this._intentStates.get(cacheKey);
-    if (!intentState) {
-      intentState = Object.create(null);
-      this._intentStates.set(cacheKey, intentState);
-    }
-
+    const intentState = this._intentStates.getOrInsertComputed(cacheKey, () =>
+      Object.create(null)
+    );
     // Ensure that a pending `streamReader` cancel timeout is always aborted.
     if (intentState.streamReaderCancelTimeout) {
       clearTimeout(intentState.streamReaderCancelTimeout);
@@ -1676,11 +1673,10 @@ class PDFPageProxy {
       isEditing,
       /* isOpList = */ true
     );
-    let intentState = this._intentStates.get(intentArgs.cacheKey);
-    if (!intentState) {
-      intentState = Object.create(null);
-      this._intentStates.set(intentArgs.cacheKey, intentState);
-    }
+    const intentState = this._intentStates.getOrInsertComputed(
+      intentArgs.cacheKey,
+      () => Object.create(null)
+    );
     let opListTask;
 
     if (!intentState.opListReadCapability) {
@@ -2516,14 +2512,9 @@ class WorkerTransport {
   }
 
   #cacheSimpleMethod(name, data = null) {
-    const cachedPromise = this.#methodPromises.get(name);
-    if (cachedPromise) {
-      return cachedPromise;
-    }
-    const promise = this.messageHandler.sendWithPromise(name, data);
-
-    this.#methodPromises.set(name, promise);
-    return promise;
+    return this.#methodPromises.getOrInsertComputed(name, () =>
+      this.messageHandler.sendWithPromise(name, data)
+    );
   }
 
   #onProgress({ loaded, total }) {
@@ -3135,22 +3126,17 @@ class WorkerTransport {
   }
 
   getMetadata() {
-    const name = "GetMetadata",
-      cachedPromise = this.#methodPromises.get(name);
-    if (cachedPromise) {
-      return cachedPromise;
-    }
-    const promise = this.messageHandler
-      .sendWithPromise(name, null)
-      .then(results => ({
+    const name = "GetMetadata";
+
+    return this.#methodPromises.getOrInsertComputed(name, () =>
+      this.messageHandler.sendWithPromise(name, null).then(results => ({
         info: results[0],
         metadata: results[1] ? new Metadata(results[1]) : null,
         contentDispositionFilename: this.#fullReader?.filename ?? null,
         contentLength: this.#fullReader?.contentLength ?? null,
         hasStructTree: results[2],
-      }));
-    this.#methodPromises.set(name, promise);
-    return promise;
+      }))
+    );
   }
 
   getMarkInfo() {
diff --git a/test/integration/reorganize_pages_spec.mjs b/test/integration/reorganize_pages_spec.mjs
index 3b4be61ff8e66..018a92d309cc1 100644
--- a/test/integration/reorganize_pages_spec.mjs
+++ b/test/integration/reorganize_pages_spec.mjs
@@ -23,6 +23,9 @@ import {
   getAnnotationSelector,
   getRect,
   getThumbnailSelector,
+  kbCopy,
+  kbCut,
+  kbDelete,
   loadAndWait,
   scrollIntoView,
   waitAndClick,
@@ -841,4 +844,144 @@ describe("Reorganize Pages View", () => {
       );
     });
   });
+
+  describe("Keyboard shortcuts for cut and copy (bug 2018139)", () => {
+    let pages;
+
+    beforeEach(async () => {
+      pages = await loadAndWait(
+        "page_with_number.pdf",
+        "#viewsManagerToggleButton",
+        "1",
+        null,
+        { enableSplitMerge: true }
+      );
+    });
+
+    afterEach(async () => {
+      await closePages(pages);
+    });
+
+    it("should cut pages with Ctrl+X and paste them", async () => {
+      await Promise.all(
+        pages.map(async ([browserName, page]) => {
+          await waitForThumbnailVisible(page, 1);
+          await waitAndClick(
+            page,
+            `.thumbnail:has(${getThumbnailSelector(1)}) input`
+          );
+          await waitAndClick(
+            page,
+            `.thumbnail:has(${getThumbnailSelector(3)}) input`
+          );
+
+          let handlePagesEdited = await waitForPagesEdited(page, "cut");
+          await kbCut(page);
+
+          let pageIndices = await awaitPromise(handlePagesEdited);
+          let expected = [2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17];
+          expect(pageIndices)
+            .withContext(`In ${browserName}`)
+            .toEqual(expected);
+          await waitForHavingContents(page, expected);
+
+          handlePagesEdited = await waitForPagesEdited(page);
+          await waitAndClick(page, `${getThumbnailSelector(1)}+button`);
+          pageIndices = await awaitPromise(handlePagesEdited);
+          expected = [
+            2, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17,
+          ];
+          expect(pageIndices)
+            .withContext(`In ${browserName}`)
+            .toEqual(expected);
+          await waitForHavingContents(page, expected);
+        })
+      );
+    });
+
+    it("should copy pages with Ctrl+C and paste them", async () => {
+      await Promise.all(
+        pages.map(async ([browserName, page]) => {
+          await waitForThumbnailVisible(page, 1);
+          await waitAndClick(
+            page,
+            `.thumbnail:has(${getThumbnailSelector(1)}) input`
+          );
+          await waitAndClick(
+            page,
+            `.thumbnail:has(${getThumbnailSelector(3)}) input`
+          );
+
+          let handlePagesEdited = await waitForPagesEdited(page, "copy");
+          await kbCopy(page);
+
+          let pageIndices = await awaitPromise(handlePagesEdited);
+          let expected = [
+            1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17,
+          ];
+          expect(pageIndices)
+            .withContext(`In ${browserName}`)
+            .toEqual(expected);
+          await waitForHavingContents(page, expected);
+
+          handlePagesEdited = await waitForPagesEdited(page);
+          await waitAndClick(page, `${getThumbnailSelector(2)}+button`);
+          pageIndices = await awaitPromise(handlePagesEdited);
+          expected = [
+            1, 2, 1, 3, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17,
+          ];
+          expect(pageIndices)
+            .withContext(`In ${browserName}`)
+            .toEqual(expected);
+          await waitForHavingContents(page, expected);
+        })
+      );
+    });
+  });
+
+  describe("Keyboard shortcuts for delete (bug 2010831)", () => {
+    let pages;
+
+    beforeEach(async () => {
+      pages = await loadAndWait(
+        "page_with_number.pdf",
+        "#viewsManagerToggleButton",
+        "1",
+        null,
+        { enableSplitMerge: true }
+      );
+    });
+
+    afterEach(async () => {
+      await closePages(pages);
+    });
+
+    it("should delete pages with the Delete key", async () => {
+      await Promise.all(
+        pages.map(async ([browserName, page]) => {
+          await waitForThumbnailVisible(page, 1);
+          await waitAndClick(
+            page,
+            `.thumbnail:has(${getThumbnailSelector(1)}) input`
+          );
+          await waitAndClick(
+            page,
+            `.thumbnail:has(${getThumbnailSelector(3)}) input`
+          );
+
+          const handlePagesEdited = await waitForPagesEdited(page);
+          await kbDelete(page);
+
+          const pageIndices = await awaitPromise(handlePagesEdited);
+          const expected = [
+            2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17,
+          ];
+          expect(pageIndices)
+            .withContext(`In ${browserName}`)
+            .toEqual(expected);
+          await waitForHavingContents(page, expected);
+        })
+      );
+    });
+  });
 });
diff --git a/test/integration/test_utils.mjs b/test/integration/test_utils.mjs
index e571d2f63059d..6e561ac1aa333 100644
--- a/test/integration/test_utils.mjs
+++ b/test/integration/test_utils.mjs
@@ -702,6 +702,14 @@ async function kbCopy(page) {
   await page.keyboard.press("c", { commands: ["Copy"] });
   await page.keyboard.up(modifier);
 }
+async function kbCut(page) {
+  await page.keyboard.down(modifier);
+  await page.keyboard.press("x", { commands: ["Cut"] });
+  await page.keyboard.up(modifier);
+}
+async function kbDelete(page) {
+  await page.keyboard.press("Delete");
+}
 async function kbPaste(page) {
   await page.keyboard.down(modifier);
   await page.keyboard.press("v", { commands: ["Paste"] });
@@ -997,6 +1005,9 @@ export {
   kbBigMoveLeft,
   kbBigMoveRight,
   kbBigMoveUp,
+  kbCopy,
+  kbCut,
+  kbDelete,
   kbDeleteLastWord,
   kbFocusNext,
   kbFocusPrevious,
diff --git a/web/pdf_find_utils.js b/web/pdf_find_utils.js
index dc32e073d2172..bb52a46231037 100644
--- a/web/pdf_find_utils.js
+++ b/web/pdf_find_utils.js
@@ -120,11 +120,21 @@ function getNormalizeWithNFKC() {
     (typeof PDFJSDev === "undefined" && FeatureTest.platform.isFirefox) ||
     (typeof PDFJSDev !== "undefined" && PDFJSDev.test("MOZCENTRAL"))
   ) {
+    // The `NormalizeWithNFKC` string is generated with the for loop below.
+    // Because of a small difference between Chrome and Firefox, the string is
+    // only hardcoded for Firefox, and Chrome (or others) will generate it at
+    // runtime.
+    // In order to detect if the string is up to date, a check is performed in
+    // the loop below, and if a difference is detected, an error is thrown.
     /* eslint-disable no-irregular-whitespace */
     NormalizeWithNFKC ||= `\xA0¨ª¯²-µ¸-º¼-¾IJ-ijĿ-ŀʼnſDŽ-njDZ-dzʰ-ʸ˘-˝ˠ-ˤʹͺ;΄-΅·ϐ-ϖϰ-ϲϴ-ϵϹևٵ-ٸक़-य़ড়-ঢ়য়ਲ਼ਸ਼ਖ਼-ਜ਼ਫ਼ଡ଼-ଢ଼ำຳໜ-ໝ༌གྷཌྷདྷབྷཛྷཀྵჼᴬ-ᴮᴰ-ᴺᴼ-ᵍᵏ-ᵪᵸᶛ-ᶿẚ-ẛάέήίόύώΆ᾽-῁ΈΉ῍-῏ΐΊ῝-῟ΰΎ῭-`ΌΏ´-῾ - ‑‗․-… ″-‴‶-‷‼‾⁇-⁉⁗ ⁰-ⁱ⁴-₎ₐ-ₜ₨℀-℃℅-ℇ℉-ℓℕ-№ℙ-ℝ℠-™ℤΩℨK-ℭℯ-ℱℳ-ℹ℻-⅀ⅅ-ⅉ⅐-ⅿ↉∬-∭∯-∰〈-〉①-⓪⨌⩴-⩶⫝̸ⱼ-ⱽⵯ⺟⻳⼀-⿕　〶〸-〺゛-゜ゟヿㄱ-ㆎ㆒-㆟㈀-㈞㈠-㉇㉐-㉾㊀-㏿ꚜ-ꚝꝰ꟱-ꟴꟸ-ꟹꭜ-ꭟꭩ豈-嗀塚晴凞-羽蘒諸逸-都飯-舘並-龎ff-stﬓ-ﬗיִײַ-זּטּ-לּמּנּ-סּףּ-פּצּ-ﮱﯓ-ﴽﵐ-ﶏﶒ-ﷇﷰ-﷼︐-︙︰-﹄﹇-﹒﹔-﹦﹨-﹫ﹰ-ﹲﹴﹶ-ﻼ！-ﾾￂ-ￇￊ-ￏￒ-ￗￚ-ￜ￠-￦`;
   }
 
-  if (typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) {
+  if (
+    typeof PDFJSDev === "undefined" ||
+    PDFJSDev.test("TESTING") ||
+    (!PDFJSDev.test("MOZCENTRAL") && !NormalizeWithNFKC)
+  ) {
     const ranges = [];
     const range = [];
     const diacriticsRegex = /^\p{M}$/u;
diff --git a/web/pdf_thumbnail_viewer.js b/web/pdf_thumbnail_viewer.js
index 5619a0eef1852..e823979cb6222 100644
--- a/web/pdf_thumbnail_viewer.js
+++ b/web/pdf_thumbnail_viewer.js
@@ -884,6 +884,33 @@ class PDFThumbnailViewer {
           }
           // For checkboxes, let the default behavior handle toggling
           break;
+        case "c":
+          if (
+            this.#enableSplitMerge &&
+            (e.ctrlKey || e.metaKey) &&
+            this.#selectedPages?.size
+          ) {
+            this.#copyPages();
+            stopEvent(e);
+          }
+          break;
+        case "x":
+          if (
+            this.#enableSplitMerge &&
+            (e.ctrlKey || e.metaKey) &&
+            this.#selectedPages?.size
+          ) {
+            this.#cutPages();
+            stopEvent(e);
+          }
+          break;
+        case "Delete":
+        case "Backspace":
+          if (this.#enableSplitMerge && this.#selectedPages?.size) {
+            this.#deletePages();
+            stopEvent(e);
+          }
+          break;
       }
     });
     this.container.addEventListener("click", e => {