Starting about a week or two ago, I noticed the text of Firefox is grainy. But when the cursor moved, it would get grainy in a different way. So, some letters which were previously unreadable became readable, but other letters became unreadable. Going to the same web pages with other browsers renders the page readable. So, the problem seems to be Firefox specific. Even while typing this, portions of the characters on my screen blink in and out. If there is no solution, I will have to utilize some other browser. Thank you,