diff --git a/apps/browser/src/autofill/content/autofill-init.spec.ts b/apps/browser/src/autofill/content/autofill-init.spec.ts
index 8912a8c0ba..b299ddccbf 100644
--- a/apps/browser/src/autofill/content/autofill-init.spec.ts
+++ b/apps/browser/src/autofill/content/autofill-init.spec.ts
@@ -24,6 +24,7 @@ describe("AutofillInit", () => {
       },
     });
     autofillInit = new AutofillInit(autofillOverlayContentService);
+    window.IntersectionObserver = jest.fn(() => mock<IntersectionObserver>());
   });
 
   afterEach(() => {
diff --git a/apps/browser/src/autofill/services/autofill-overlay-content.service.spec.ts b/apps/browser/src/autofill/services/autofill-overlay-content.service.spec.ts
index 9f3ffea142..96a1b4c851 100644
--- a/apps/browser/src/autofill/services/autofill-overlay-content.service.spec.ts
+++ b/apps/browser/src/autofill/services/autofill-overlay-content.service.spec.ts
@@ -173,12 +173,10 @@ describe("AutofillOverlayContentService", () => {
         autofillFieldData = mock<AutofillField>();
       });
 
-      it("ignores fields that are readonly", () => {
+      it("ignores fields that are readonly", async () => {
         autofillFieldData.readonly = true;
 
-        // FIXME: Verify that this floating promise is intentional. If it is, add an explanatory comment and ensure there is proper error handling.
-        // eslint-disable-next-line @typescript-eslint/no-floating-promises
-        autofillOverlayContentService.setupAutofillOverlayListenerOnField(
+        await autofillOverlayContentService.setupAutofillOverlayListenerOnField(
           autofillFieldElement,
           autofillFieldData,
         );
@@ -186,12 +184,10 @@ describe("AutofillOverlayContentService", () => {
         expect(autofillFieldElement.addEventListener).not.toHaveBeenCalled();
       });
 
-      it("ignores fields that contain a disabled attribute", () => {
+      it("ignores fields that contain a disabled attribute", async () => {
         autofillFieldData.disabled = true;
 
-        // FIXME: Verify that this floating promise is intentional. If it is, add an explanatory comment and ensure there is proper error handling.
-        // eslint-disable-next-line @typescript-eslint/no-floating-promises
-        autofillOverlayContentService.setupAutofillOverlayListenerOnField(
+        await autofillOverlayContentService.setupAutofillOverlayListenerOnField(
           autofillFieldElement,
           autofillFieldData,
         );
@@ -199,12 +195,10 @@ describe("AutofillOverlayContentService", () => {
         expect(autofillFieldElement.addEventListener).not.toHaveBeenCalled();
       });
 
-      it("ignores fields that are not viewable", () => {
+      it("ignores fields that are not viewable", async () => {
         autofillFieldData.viewable = false;
 
-        // FIXME: Verify that this floating promise is intentional. If it is, add an explanatory comment and ensure there is proper error handling.
-        // eslint-disable-next-line @typescript-eslint/no-floating-promises
-        autofillOverlayContentService.setupAutofillOverlayListenerOnField(
+        await autofillOverlayContentService.setupAutofillOverlayListenerOnField(
           autofillFieldElement,
           autofillFieldData,
         );
@@ -213,12 +207,10 @@ describe("AutofillOverlayContentService", () => {
       });
 
       it("ignores fields that are part of the ExcludedOverlayTypes", () => {
-        AutoFillConstants.ExcludedOverlayTypes.forEach((excludedType) => {
+        AutoFillConstants.ExcludedOverlayTypes.forEach(async (excludedType) => {
           autofillFieldData.type = excludedType;
 
-          // FIXME: Verify that this floating promise is intentional. If it is, add an explanatory comment and ensure there is proper error handling.
-          // eslint-disable-next-line @typescript-eslint/no-floating-promises
-          autofillOverlayContentService.setupAutofillOverlayListenerOnField(
+          await autofillOverlayContentService.setupAutofillOverlayListenerOnField(
             autofillFieldElement,
             autofillFieldData,
           );
@@ -227,12 +219,10 @@ describe("AutofillOverlayContentService", () => {
         });
       });
 
-      it("ignores fields that contain the keyword `search`", () => {
+      it("ignores fields that contain the keyword `search`", async () => {
         autofillFieldData.placeholder = "search";
 
-        // FIXME: Verify that this floating promise is intentional. If it is, add an explanatory comment and ensure there is proper error handling.
-        // eslint-disable-next-line @typescript-eslint/no-floating-promises
-        autofillOverlayContentService.setupAutofillOverlayListenerOnField(
+        await autofillOverlayContentService.setupAutofillOverlayListenerOnField(
           autofillFieldElement,
           autofillFieldData,
         );
@@ -240,12 +230,10 @@ describe("AutofillOverlayContentService", () => {
         expect(autofillFieldElement.addEventListener).not.toHaveBeenCalled();
       });
 
-      it("ignores fields that contain the keyword `captcha` ", () => {
+      it("ignores fields that contain the keyword `captcha` ", async () => {
         autofillFieldData.placeholder = "captcha";
 
-        // FIXME: Verify that this floating promise is intentional. If it is, add an explanatory comment and ensure there is proper error handling.
-        // eslint-disable-next-line @typescript-eslint/no-floating-promises
-        autofillOverlayContentService.setupAutofillOverlayListenerOnField(
+        await autofillOverlayContentService.setupAutofillOverlayListenerOnField(
           autofillFieldElement,
           autofillFieldData,
         );
@@ -253,12 +241,10 @@ describe("AutofillOverlayContentService", () => {
         expect(autofillFieldElement.addEventListener).not.toHaveBeenCalled();
       });
 
-      it("ignores fields that do not appear as a login field", () => {
+      it("ignores fields that do not appear as a login field", async () => {
         autofillFieldData.placeholder = "not-a-login-field";
 
-        // FIXME: Verify that this floating promise is intentional. If it is, add an explanatory comment and ensure there is proper error handling.
-        // eslint-disable-next-line @typescript-eslint/no-floating-promises
-        autofillOverlayContentService.setupAutofillOverlayListenerOnField(
+        await autofillOverlayContentService.setupAutofillOverlayListenerOnField(
           autofillFieldElement,
           autofillFieldData,
         );
@@ -267,6 +253,17 @@ describe("AutofillOverlayContentService", () => {
       });
     });
 
+    it("skips setup on fields that have been previously set up", async () => {
+      autofillOverlayContentService["formFieldElements"].add(autofillFieldElement);
+
+      await autofillOverlayContentService.setupAutofillOverlayListenerOnField(
+        autofillFieldElement,
+        autofillFieldData,
+      );
+
+      expect(autofillFieldElement.addEventListener).not.toHaveBeenCalled();
+    });
+
     describe("identifies the overlay visibility setting", () => {
       it("defaults the overlay visibility setting to `OnFieldFocus` if a value is not set", async () => {
         sendExtensionMessageSpy.mockResolvedValueOnce(undefined);
diff --git a/apps/browser/src/autofill/services/autofill-overlay-content.service.ts b/apps/browser/src/autofill/services/autofill-overlay-content.service.ts
index cd373cdfd3..4b786e6ca3 100644
--- a/apps/browser/src/autofill/services/autofill-overlay-content.service.ts
+++ b/apps/browser/src/autofill/services/autofill-overlay-content.service.ts
@@ -86,7 +86,7 @@ class AutofillOverlayContentService implements AutofillOverlayContentServiceInte
     formFieldElement: ElementWithOpId<FormFieldElement>,
     autofillFieldData: AutofillField,
   ) {
-    if (this.isIgnoredField(autofillFieldData)) {
+    if (this.isIgnoredField(autofillFieldData) || this.formFieldElements.has(formFieldElement)) {
       return;
     }
 
diff --git a/apps/browser/src/autofill/services/collect-autofill-content.service.spec.ts b/apps/browser/src/autofill/services/collect-autofill-content.service.spec.ts
index d5c461269b..79cb41b9a1 100644
--- a/apps/browser/src/autofill/services/collect-autofill-content.service.spec.ts
+++ b/apps/browser/src/autofill/services/collect-autofill-content.service.spec.ts
@@ -27,6 +27,7 @@ describe("CollectAutofillContentService", () => {
   const domElementVisibilityService = new DomElementVisibilityService();
   const autofillOverlayContentService = new AutofillOverlayContentService();
   let collectAutofillContentService: CollectAutofillContentService;
+  const mockIntersectionObserver = mock<IntersectionObserver>();
 
   beforeEach(() => {
     document.body.innerHTML = mockLoginForm;
@@ -34,6 +35,7 @@ describe("CollectAutofillContentService", () => {
       domElementVisibilityService,
       autofillOverlayContentService,
     );
+    window.IntersectionObserver = jest.fn(() => mockIntersectionObserver);
   });
 
   afterEach(() => {
@@ -2527,10 +2529,10 @@ describe("CollectAutofillContentService", () => {
     });
 
     updatedAttributes.forEach((attribute) => {
-      it(`will update the ${attribute} value for the field element`, async () => {
+      it(`will update the ${attribute} value for the field element`, () => {
         jest.spyOn(collectAutofillContentService["autofillFieldElements"], "set");
 
-        await collectAutofillContentService["updateAutofillFieldElementData"](
+        collectAutofillContentService["updateAutofillFieldElementData"](
           attribute,
           fieldElement,
           autofillField,
@@ -2543,10 +2545,10 @@ describe("CollectAutofillContentService", () => {
       });
     });
 
-    it("will not update an attribute value if it is not present in the updateActions object", async () => {
+    it("will not update an attribute value if it is not present in the updateActions object", () => {
       jest.spyOn(collectAutofillContentService["autofillFieldElements"], "set");
 
-      await collectAutofillContentService["updateAutofillFieldElementData"](
+      collectAutofillContentService["updateAutofillFieldElementData"](
         "random-attribute",
         fieldElement,
         autofillField,
@@ -2555,4 +2557,67 @@ describe("CollectAutofillContentService", () => {
       expect(collectAutofillContentService["autofillFieldElements"].set).not.toBeCalled();
     });
   });
+
+  describe("handleFormElementIntersection", () => {
+    let isFormFieldViewableSpy: jest.SpyInstance;
+    let setupAutofillOverlayListenerOnFieldSpy: jest.SpyInstance;
+
+    beforeEach(() => {
+      isFormFieldViewableSpy = jest.spyOn(
+        collectAutofillContentService["domElementVisibilityService"],
+        "isFormFieldViewable",
+      );
+      setupAutofillOverlayListenerOnFieldSpy = jest.spyOn(
+        collectAutofillContentService["autofillOverlayContentService"],
+        "setupAutofillOverlayListenerOnField",
+      );
+    });
+
+    it("skips the initial intersection event for an observed element", async () => {
+      const formFieldElement = document.createElement("input") as ElementWithOpId<FormFieldElement>;
+      collectAutofillContentService["elementInitializingIntersectionObserver"].add(
+        formFieldElement,
+      );
+      const entries = [
+        { target: formFieldElement, isIntersecting: true },
+      ] as unknown as IntersectionObserverEntry[];
+
+      await collectAutofillContentService["handleFormElementIntersection"](entries);
+
+      expect(isFormFieldViewableSpy).not.toHaveBeenCalled();
+      expect(setupAutofillOverlayListenerOnFieldSpy).not.toHaveBeenCalled();
+    });
+
+    it("skips setting up the overlay listeners on a field that is not viewable", async () => {
+      const formFieldElement = document.createElement("input") as ElementWithOpId<FormFieldElement>;
+      const entries = [
+        { target: formFieldElement, isIntersecting: true },
+      ] as unknown as IntersectionObserverEntry[];
+      isFormFieldViewableSpy.mockReturnValueOnce(false);
+
+      await collectAutofillContentService["handleFormElementIntersection"](entries);
+
+      expect(isFormFieldViewableSpy).toHaveBeenCalledWith(formFieldElement);
+      expect(setupAutofillOverlayListenerOnFieldSpy).not.toHaveBeenCalled();
+    });
+
+    it("sets up the overlay listeners on a viewable field", async () => {
+      const formFieldElement = document.createElement("input") as ElementWithOpId<FormFieldElement>;
+      const autofillField = mock<AutofillField>();
+      const entries = [
+        { target: formFieldElement, isIntersecting: true },
+      ] as unknown as IntersectionObserverEntry[];
+      isFormFieldViewableSpy.mockReturnValueOnce(true);
+      collectAutofillContentService["autofillFieldElements"].set(formFieldElement, autofillField);
+      collectAutofillContentService["intersectionObserver"] = mockIntersectionObserver;
+
+      await collectAutofillContentService["handleFormElementIntersection"](entries);
+
+      expect(isFormFieldViewableSpy).toHaveBeenCalledWith(formFieldElement);
+      expect(setupAutofillOverlayListenerOnFieldSpy).toHaveBeenCalledWith(
+        formFieldElement,
+        autofillField,
+      );
+    });
+  });
 });
diff --git a/apps/browser/src/autofill/services/collect-autofill-content.service.ts b/apps/browser/src/autofill/services/collect-autofill-content.service.ts
index 3144edcda9..63dee7f3b1 100644
--- a/apps/browser/src/autofill/services/collect-autofill-content.service.ts
+++ b/apps/browser/src/autofill/services/collect-autofill-content.service.ts
@@ -38,6 +38,8 @@ class CollectAutofillContentService implements CollectAutofillContentServiceInte
   private autofillFormElements: AutofillFormElements = new Map();
   private autofillFieldElements: AutofillFieldElements = new Map();
   private currentLocationHref = "";
+  private intersectionObserver: IntersectionObserver;
+  private elementInitializingIntersectionObserver: Set<Element> = new Set();
   private mutationObserver: MutationObserver;
   private updateAutofillElementsAfterMutationTimeout: number | NodeJS.Timeout;
   private readonly updateAfterMutationTimeoutDelay = 1000;
@@ -70,6 +72,10 @@ class CollectAutofillContentService implements CollectAutofillContentServiceInte
       this.setupMutationObserver();
     }
 
+    if (!this.intersectionObserver) {
+      this.setupIntersectionObserver();
+    }
+
     if (!this.domRecentlyMutated && this.noFieldsFound) {
       return this.getFormattedPageDetails({}, []);
     }
@@ -360,11 +366,14 @@ class CollectAutofillContentService implements CollectAutofillContentServiceInte
       tagName: this.getAttributeLowerCase(element, "tagName"),
     };
 
+    if (!autofillFieldBase.viewable) {
+      this.elementInitializingIntersectionObserver.add(element);
+      this.intersectionObserver.observe(element);
+    }
+
     if (elementIsSpanElement(element)) {
       this.cacheAutofillFieldElement(index, element, autofillFieldBase);
-      // FIXME: Verify that this floating promise is intentional. If it is, add an explanatory comment and ensure there is proper error handling.
-      // eslint-disable-next-line @typescript-eslint/no-floating-promises
-      this.autofillOverlayContentService?.setupAutofillOverlayListenerOnField(
+      void this.autofillOverlayContentService?.setupAutofillOverlayListenerOnField(
         element,
         autofillFieldBase,
       );
@@ -407,9 +416,10 @@ class CollectAutofillContentService implements CollectAutofillContentServiceInte
     };
 
     this.cacheAutofillFieldElement(index, element, autofillField);
-    // FIXME: Verify that this floating promise is intentional. If it is, add an explanatory comment and ensure there is proper error handling.
-    // eslint-disable-next-line @typescript-eslint/no-floating-promises
-    this.autofillOverlayContentService?.setupAutofillOverlayListenerOnField(element, autofillField);
+    void this.autofillOverlayContentService?.setupAutofillOverlayListenerOnField(
+      element,
+      autofillField,
+    );
     return autofillField;
   };
 
@@ -1189,8 +1199,6 @@ class CollectAutofillContentService implements CollectAutofillContentServiceInte
       return;
     }
 
-    // FIXME: Verify that this floating promise is intentional. If it is, add an explanatory comment and ensure there is proper error handling.
-    // eslint-disable-next-line @typescript-eslint/no-floating-promises
     this.updateAutofillFieldElementData(
       attributeName,
       targetElement as ElementWithOpId<FormFieldElement>,
@@ -1232,13 +1240,12 @@ class CollectAutofillContentService implements CollectAutofillContentServiceInte
 
   /**
    * Updates the autofill field element data based on the passed attribute name.
+   *
    * @param {string} attributeName
    * @param {ElementWithOpId<FormFieldElement>} element
    * @param {AutofillField} dataTarget
-   * @returns {Promise<void>}
-   * @private
    */
-  private async updateAutofillFieldElementData(
+  private updateAutofillFieldElementData(
     attributeName: string,
     element: ElementWithOpId<FormFieldElement>,
     dataTarget: AutofillField,
@@ -1304,6 +1311,52 @@ class CollectAutofillContentService implements CollectAutofillContentServiceInte
     return attributeValue;
   }
 
+  /**
+   * Sets up an IntersectionObserver to observe found form
+   * field elements that are not viewable in the viewport.
+   */
+  private setupIntersectionObserver() {
+    this.intersectionObserver = new IntersectionObserver(this.handleFormElementIntersection, {
+      root: null,
+      rootMargin: "0px",
+      threshold: 1.0,
+    });
+  }
+
+  /**
+   * Handles observed form field elements that are not viewable in the viewport.
+   * Will re-evaluate the visibility of the element and set up the autofill
+   * overlay listeners on the field if it is viewable.
+   *
+   * @param entries - The entries observed by the IntersectionObserver
+   */
+  private handleFormElementIntersection = async (entries: IntersectionObserverEntry[]) => {
+    for (let entryIndex = 0; entryIndex < entries.length; entryIndex++) {
+      const entry = entries[entryIndex];
+      const formFieldElement = entry.target as ElementWithOpId<FormFieldElement>;
+      if (this.elementInitializingIntersectionObserver.has(formFieldElement)) {
+        this.elementInitializingIntersectionObserver.delete(formFieldElement);
+        continue;
+      }
+
+      const isViewable =
+        await this.domElementVisibilityService.isFormFieldViewable(formFieldElement);
+      if (!isViewable) {
+        continue;
+      }
+
+      const cachedAutofillFieldElement = this.autofillFieldElements.get(formFieldElement);
+      cachedAutofillFieldElement.viewable = true;
+
+      void this.autofillOverlayContentService?.setupAutofillOverlayListenerOnField(
+        formFieldElement,
+        cachedAutofillFieldElement,
+      );
+
+      this.intersectionObserver.unobserve(entry.target);
+    }
+  };
+
   /**
    * Destroys the CollectAutofillContentService. Clears all
    * timeouts and disconnects the mutation observer.
@@ -1313,6 +1366,7 @@ class CollectAutofillContentService implements CollectAutofillContentServiceInte
       clearTimeout(this.updateAutofillElementsAfterMutationTimeout);
     }
     this.mutationObserver?.disconnect();
+    this.intersectionObserver?.disconnect();
   }
 }