STEPS TO REPRODUCE:
1. Load any page in a debug build. (e.g. this page, or about:blank)
2. Hit Ctrl+F to open find-bar
3. Type "a"
4. Hit 'Esc' to close find-bar
5. Hit Ctrl+F again (or Ctrl+G)
(repeat steps 4-5 as desired)
ACTUAL RESULTS: At step 5, the find-bar re-appears, with "a" pre-entered, and these warnings get spammed to console:
> WARNING: NS_ENSURE_SUCCESS(result, result) failed with result 0x80004005: file editor/libeditor/base/nsEditor.cpp, line 3898
> WARNING: NS_ENSURE_SUCCESS(res, res) failed with result 0x80004005: file editor/libeditor/text/nsTextEditRules.cpp, line 471
EXPECTED RESULTS: No warnings.
This has been fixed by something that I've done somewhere!