This problem has only recently started.
I open the Reader to scroll through those I follow. In a few minutes the page begins to freeze. If I try to go to a blog page, it is almost impossible to move on the page. I get the same reaction that I might get if I had many many applications open. Mouse will barely move. But I only have the browser opened to the Reader page. There is nothing to do but try to relog in or more likely reboot.
I am not having this lag/freeze on other internet sites. The effect is happening on the Reader page in both the FF and Chromium browsers. Someone suggested to me that my page might be corrupted. I hope you can offer a solution.