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Rated 4 out of 5 stars
This is a wonderful and much needed addon, however, as others have noted, it has some serious side effects:
1. Text on tabs disappears and reappears at random
2. Text in Bookmark lists disappears and reappears at random when scrolling.
3. Text in text areas, such as this one, disappears and reappears. This can be forced by pressing enter at the end of a line
The test will vanish and reappear within a few seconds.