Firefox Korean IME composition events fire in wrong order with rapid typing
OS: Windows 10/11 · Device: Desktop Any · Browser: Firefox 115.0+ · Keyboard: Korean (IME)
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Firefox may dispatch composition and input events in a different order than Chromium for Korean IME—handlers that assume Chrome ordering desync.
Firefox may dispatch composition and input events in a different order than Chromium for Korean IME—handlers that assume Chrome ordering desync.
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| Case | OS | Device | Browser | Keyboard | Status |
|---|---|---|---|---|---|
| ce-0222-korean-ime-firefox-order | Windows 10/11 | Desktop Any | Firefox 115.0+ | Korean (IME) | draft |
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OS: Windows 10/11 · Device: Desktop Any · Browser: Firefox 115.0+ · Keyboard: Korean (IME)
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Escape typically cancels IME composition or closes the candidate window. In Edge, Firefox, and other engines, timing and whether partial text remains in the DOM differ—Arabic and Korean IME cases show cross-browser variance.
If the user switches focus to another field, button, or nested contenteditable while Korean (or other) IME composition is active, browsers differ on whether composition is committed, cancelled, or leaves orphan state. Chrome, Safari, and Firefox do not agree; mobile adds more variance.
Pasting from the clipboard while IME composition is active may cancel the composition session, replace the wrong range, or interleave pasted text with unfinished syllables—Firefox and Chrome show different behavior for Korean and Hindi IME paths.
On Firefox with Windows 10 and Korean IME, specific key combination during IME composition causes the editor to crash. The crash occurs when typing certain sequences with the Korean IME.
Moving focus away from the editor while composing text (Chinese, Japanese, Korean) can cancel composition, commit partial text, or leave the IME candidate window out of sync. Safari often shows distinct behavior for Japanese; Chrome behavior for Chinese/Korean is covered in related cases.
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