312967 2026-04-21 23:24:31 -0700 Two adjacent placeholders for the i18n replacement are wrongly replaced. 2026-04-22 07:03:04 -0700 1 1 1 Unclassified WebKit WebKit Extensions Safari 26 Mac (Apple Silicon) macOS 26 RESOLVED FIXED InRadar P2 Normal --- 1 i.am.kanaru.sato webkit-unassigned timothy webkit-bug-importer oldest_to_newest 2203056 0 i.am.kanaru.sato 2026-04-21 23:24:31 -0700 Named placeholder substitution in WebExtensions localization (`i18n.getMessage`) fails when two placeholders are adjacent. Step to reproduce: - set a message in messages.json as follows: ``` "adjacent_named": { "message": "$prefix$$suffix$", "placeholders": { "prefix": { "content": "$1" }, "suffix": { "content": "$2" } } } ``` - Then call like this from JavaScript. ``` const args = ["3", "4"]; console.log(browser.i18n.getMessage("adjacent_named", args)); ``` Expected Result: - it shows `34`. Actual result: - it shows `3$SUFFIX$`. 2203057 1 webkit-bug-importer 2026-04-21 23:24:37 -0700 <rdar://problem/175315700> 2203058 2 i.am.kanaru.sato 2026-04-21 23:25:15 -0700 See also: https://github.com/WebKit/WebKit/pull/62313 2203161 3 ews-feeder 2026-04-22 07:03:02 -0700 Committed 311769@main (9d2313b02b23): <https://commits.webkit.org/311769@main> Reviewed commits have been landed. Closing PR #63298 and removing active labels.