diff --git a/.changeset/fix-text-selection.md b/.changeset/fix-text-selection.md
new file mode 100644
index 0000000000..3bcd4f5a4d
--- /dev/null
+++ b/.changeset/fix-text-selection.md
@@ -0,0 +1,5 @@
+---
+"@heroui/autocomplete": patch
+---
+
+Fix text selection behavior in autocomplete: select text on Tab key selection, place cursor at end on mouse click.
\ No newline at end of file
diff --git a/packages/components/autocomplete/__tests__/autocomplete.test.tsx b/packages/components/autocomplete/__tests__/autocomplete.test.tsx
index 0a689e6f97..6361257410 100644
--- a/packages/components/autocomplete/__tests__/autocomplete.test.tsx
+++ b/packages/components/autocomplete/__tests__/autocomplete.test.tsx
@@ -1088,4 +1088,56 @@ describe("focusedKey management with selected key", () => {
 
     expect(optionItem).toHaveAttribute("data-focus", "true");
   });
+
+  it("should not select text when item is selected via mouse click", async () => {
+    const wrapper = render(
+      <Autocomplete aria-label="Favorite Animal" data-testid="autocomplete" label="Favorite Animal">
+        <AutocompleteItem key="penguin">Penguin</AutocompleteItem>
+        <AutocompleteItem key="zebra">Zebra</AutocompleteItem>
+        <AutocompleteItem key="shark">Shark</AutocompleteItem>
+      </Autocomplete>,
+    );
+
+    const autocomplete = wrapper.getByTestId("autocomplete") as HTMLInputElement;
+
+    // open the listbox
+    await user.click(autocomplete);
+
+    let options = wrapper.getAllByRole("option");
+
+    // select the target item via mouse click
+    await user.click(options[0]);
+
+    // assert that the input has the value
+    expect(autocomplete).toHaveValue("Penguin");
+
+    // assert that the text is not selected (cursor at end)
+    expect(autocomplete.selectionStart).toBe(autocomplete.value.length);
+    expect(autocomplete.selectionEnd).toBe(autocomplete.value.length);
+  });
+
+  it("should select text when item is selected via Tab key", async () => {
+    const wrapper = render(
+      <Autocomplete aria-label="Favorite Animal" data-testid="autocomplete" label="Favorite Animal">
+        <AutocompleteItem key="penguin">Penguin</AutocompleteItem>
+        <AutocompleteItem key="zebra">Zebra</AutocompleteItem>
+        <AutocompleteItem key="shark">Shark</AutocompleteItem>
+      </Autocomplete>,
+    );
+
+    const autocomplete = wrapper.getByTestId("autocomplete") as HTMLInputElement;
+
+    // open the listbox
+    await user.click(autocomplete);
+
+    // press Tab to commit the selection (first item is focused)
+    await user.keyboard("{Tab}");
+
+    // assert that the input has the value
+    expect(autocomplete).toHaveValue("Penguin");
+
+    // assert that the text is selected
+    expect(autocomplete.selectionStart).toBe(0);
+    expect(autocomplete.selectionEnd).toBe(autocomplete.value.length);
+  });
 });
diff --git a/packages/components/autocomplete/src/use-autocomplete.ts b/packages/components/autocomplete/src/use-autocomplete.ts
index 8e4987575d..3561057715 100644
--- a/packages/components/autocomplete/src/use-autocomplete.ts
+++ b/packages/components/autocomplete/src/use-autocomplete.ts
@@ -12,7 +12,7 @@ import type {ButtonProps} from "@heroui/button";
 import type {AsyncLoadable, PressEvent} from "@react-types/shared";
 
 import {clsx, dataAttr, objectToDeps, chain, mergeProps} from "@heroui/shared-utils";
-import {useEffect, useMemo, useRef} from "react";
+import {useEffect, useMemo, useRef, useState} from "react"; // Added useState for managing focus behavior state
 import {useDOMRef} from "@heroui/react-utils";
 import {useComboBoxState} from "@react-stately/combobox";
 import {useFilter} from "@react-aria/i18n";
@@ -146,6 +146,11 @@ export function useAutocomplete<T extends object>(originalProps: UseAutocomplete
   const globalContext = useProviderContext();
   const {validationBehavior: formValidationBehavior} = useSlottedContext(FormContext) || {};
 
+  // State to control whether to skip text selection on focus, used to fix Firefox focus reset issue
+  const [shouldSkipSelect, setShouldSkipSelect] = useState(false);
+  // Ref to track the last key pressed, used to determine focus behavior
+  const lastKeyRef = useRef<string | null>(null);
+
   const [props, variantProps] = mapPropsVariants(originalProps, autocomplete.variantKeys);
   const disableAnimation =
     originalProps.disableAnimation ?? globalContext?.disableAnimation ?? false;
@@ -210,6 +215,16 @@ export function useAutocomplete<T extends object>(originalProps: UseAutocomplete
     shouldCloseOnBlur,
     allowsEmptyCollection,
     defaultFilter: defaultFilter && typeof defaultFilter === "function" ? defaultFilter : contains,
+    onSelectionChange: (key) => {
+      originalProps.onSelectionChange?.(key);
+      // Handle focus behavior after selection: skip text selection if last key was Tab to prevent Firefox focus reset
+      if (lastKeyRef.current === "Tab") {
+        setShouldSkipSelect(false);
+      } else {
+        setShouldSkipSelect(true);
+      }
+      lastKeyRef.current = null;
+    },
     onOpenChange: (open, menuTrigger) => {
       onOpenChange?.(open, menuTrigger);
       if (!open) {
@@ -413,6 +428,10 @@ export function useAutocomplete<T extends object>(originalProps: UseAutocomplete
       if ("continuePropagation" in e) {
         e.stopPropagation = () => {};
       }
+      // Track Tab key presses to adjust focus behavior and prevent unwanted text selection in Firefox
+      if (e.key === "Tab") {
+        lastKeyRef.current = "Tab";
+      }
 
       return originalOnKeyDown(e);
     };
@@ -491,6 +510,31 @@ export function useAutocomplete<T extends object>(originalProps: UseAutocomplete
           ? errorMessage({isInvalid, validationErrors, validationDetails})
           : errorMessage || validationErrors?.join(" "),
       onClick: chain(slotsProps.inputProps.onClick, otherProps.onClick),
+      onFocus: chain(
+        inputProps.onFocus,
+        otherProps.onFocus,
+        (e: React.FocusEvent<HTMLInputElement>) => {
+          // Custom focus behavior to fix Firefox focus reset issue: control text selection based on selection state
+          if (shouldSkipSelect) {
+            if (e.target.value) {
+              const length = e.target.value.length;
+
+              e.target.setSelectionRange(length, length);
+            }
+          } else if (
+            e.target.value &&
+            state.selectedItem &&
+            e.target.value === state.selectedItem.textValue
+          ) {
+            e.target.select();
+          } else if (e.target.value) {
+            const length = e.target.value.length;
+
+            e.target.setSelectionRange(length, length);
+          }
+          setShouldSkipSelect(false);
+        },
+      ),
     }) as unknown as InputProps;
 
   const getListBoxProps = () => {