Firefox Linux Korean Hangul IME combines characters incorrectly
OS: Linux 22.04+ · Device: Desktop Any · Browser: Firefox 115.0+ · Keyboard: Korean (Hangul IME)
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IBus Hangul and other backends on Linux produce different composition sequences between Firefox and Chromium—especially around Wayland, XIM, and GTK_IM_MODULE.
IBus Hangul and other backends on Linux produce different composition sequences between Firefox and Chromium—especially around Wayland, XIM, and GTK_IM_MODULE.
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| Case | OS | Device | Browser | Keyboard | Status |
|---|---|---|---|---|---|
| ce-0227-linux-korean-ime-firefox | Linux 22.04+ | Desktop Any | Firefox 115.0+ | Korean (Hangul IME) | draft |
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OS: Linux 22.04+ · Device: Desktop Any · Browser: Firefox 115.0+ · Keyboard: Korean (Hangul IME)
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Fcitx5/Fcitx hangul modules interact with Chromium and Firefox through different input paths than IBus—composition event ordering and Wayland vs X11 add variance.
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.
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