fix: mobile firefox inputs

src/browser.ts

@@ -0,0 +1,36 @@
+export function isMobileFirefox(): boolean | undefined {
+  const userAgent = navigator.userAgent;
+  return (
+    typeof window !== 'undefined' &&
+    ((/Firefox/.test(userAgent) && /Mobile/.test(userAgent)) || // Android Firefox
+      /FxiOS/.test(userAgent)) // iOS Firefox
+  );
+}
+
+export function isMac(): boolean | undefined {
+  return testPlatform(/^Mac/);
+}
+
+export function isIPhone(): boolean | undefined {
+  return testPlatform(/^iPhone/);
+}
+
+export function isSafari(): boolean | undefined {
+  return /^((?!chrome|android).)*safari/i.test(navigator.userAgent);
+}
+
+export function isIPad(): boolean | undefined {
+  return (
+    testPlatform(/^iPad/) ||
+    // iPadOS 13 lies and says it's a Mac, but we can distinguish by detecting touch support.
+    (isMac() && navigator.maxTouchPoints > 1)
+  );
+}
+
+export function isIOS(): boolean | undefined {
+  return isIPhone() || isIPad();
+}
+
+export function testPlatform(re: RegExp): boolean | undefined {
+  return typeof window !== 'undefined' && window.navigator != null ? re.test(window.navigator.platform) : undefined;
+}

src/index.tsx

@@ -4,7 +4,7 @@ import * as DialogPrimitive from '@radix-ui/react-dialog';
 import React from 'react';
 import { DrawerContext, useDrawerContext } from './context';
 import './style.css';
-import { usePreventScroll, isInput, isIOS } from './use-prevent-scroll';
+import { usePreventScroll, isInput } from './use-prevent-scroll';
 import { useComposedRefs } from './use-composed-refs';
 import { useSnapPoints } from './use-snap-points';
 import { set, getTranslate, dampenValue, isVertical, reset } from './helpers';
@@ -22,6 +22,7 @@ import { DrawerDirection } from './types';
 import { useControllableState } from './use-controllable-state';
 import { useScaleBackground } from './use-scale-background';
 import { usePositionFixed } from './use-position-fixed';
+import { isIOS, isMobileFirefox } from './browser';
 
 export interface WithFadeFromProps {
   /**
@@ -500,7 +501,6 @@ export function Root({
           const activeSnapPointHeight = snapPointsOffset[activeSnapPointIndex] || 0;
           diffFromInitial += activeSnapPointHeight;
         }
-
         previousDiffFromInitial.current = diffFromInitial;
         // We don't have to change the height if the input is in view, when we are here we are in the opened keyboard state so we can correctly check if the input is in view
         if (drawerHeight > visualViewportHeight || keyboardIsOpen.current) {
@@ -516,7 +516,7 @@ export function Root({
           } else {
             drawerRef.current.style.height = `${Math.max(newDrawerHeight, visualViewportHeight - offsetFromTop)}px`;
           }
-        } else {
+        } else if (!isMobileFirefox()) {
           drawerRef.current.style.height = `${initialDrawerHeight.current}px`;
         }
 

src/use-position-fixed.ts

@@ -1,5 +1,5 @@
 import React from 'react';
-import { isSafari } from './use-prevent-scroll';
+import { isSafari } from './browser';
 
 let previousBodyPosition: Record<string, string> | null = null;
 

src/use-prevent-scroll.ts

@@ -1,6 +1,7 @@
 // This code comes from https://github.com/adobe/react-spectrum/blob/main/packages/%40react-aria/overlays/src/usePreventScroll.ts
 
 import { useEffect, useLayoutEffect } from 'react';
+import { isIOS } from './browser';
 
 const KEYBOARD_BUFFER = 24;
 
@@ -22,34 +23,6 @@ function chain(...callbacks: any[]): (...args: any[]) => void {
   };
 }
 
-function isMac(): boolean | undefined {
-  return testPlatform(/^Mac/);
-}
-
-function isIPhone(): boolean | undefined {
-  return testPlatform(/^iPhone/);
-}
-
-export function isSafari(): boolean | undefined {
-  return /^((?!chrome|android).)*safari/i.test(navigator.userAgent);
-}
-
-function isIPad(): boolean | undefined {
-  return (
-    testPlatform(/^iPad/) ||
-    // iPadOS 13 lies and says it's a Mac, but we can distinguish by detecting touch support.
-    (isMac() && navigator.maxTouchPoints > 1)
-  );
-}
-
-export function isIOS(): boolean | undefined {
-  return isIPhone() || isIPad();
-}
-
-function testPlatform(re: RegExp): boolean | undefined {
-  return typeof window !== 'undefined' && window.navigator != null ? re.test(window.navigator.platform) : undefined;
-}
-
 // @ts-ignore
 const visualViewport = typeof document !== 'undefined' && window.visualViewport;