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On screen keyboard does not stay up when Firefox is in full screen mode #185

@thirdwheel

Description

@thirdwheel

Running Firefox in full screen mode (whether normally and then F11, or with the -kiosk parameter) results in the on screen keyboard appearing briefly and then vanishing when selecting a text input field. This occurs whether I set the MOZ_USE_XINPUT2 environment variable or not.

Steps to reproduce on tablet PC

  1. Create HTML document below in current working directory, call it login.html.
<html>
<head>
    <title>Login</title>
</head>
<body>
<form method="post">
<label for="username">Username</label>
<input type="text" name="username" id="username">
<br>
<label for="password">Password</label>
<input type="password" name="password" id="password">
</form>
</body>
</html>
  1. Run firefox - firefox $PWD/login.html
  2. Tap one of the fields. Note that the on screen keyboard appears after a couple of presses
  3. Press F11 to go full screen and try to tap a field again. Note that keyboard appears for a moment (I've seen up to a second) and then vanishes.
  4. Run firefox in kisok mode - firefox -kiosk $PWD/login.html - and repeat step 2, noting that the same behaviour with the keyboard occurs here as it did in step 4.

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