Force to set 'word-break' to 'normal' so that Japanese 禁則処理 works as expected regardless of CSS setting.(英文のあとに日本語による説明があります)
If Japanese isn't your primary language, you probably don't want to install this extension.
For some historical reason, there are bunch of Japanese sites which set "word-break" CSS attribute to "break-all". Such web page breaks Japanese 禁則処理 (kinsoku-shori) miserably on WebKit based browser such as Chrome.
This extension always resets "word-break" attribute to "normal" so that Japanese text gets rendered as it should be.