When I open Firefox then go to bookmarks and select a site, they open as expected. However, when I go to my emails bookmark and click on it, the screen refreshs but does not change. In order to open my emails I have to click on the bookmark a second time, then it opens as it should. The exception to this is that if I go to any other bookmarked site first then from that site, go to and click on the emails bookmark, it opens normally at the first click.

I've tried refreshing Firefox as per the instructions but that didn't fix the problem. This seems to have started after Firefox updated itself the last time. I have made no changes to my Firefox settings so I'm not sure as to why this glitch is suddenly surfaced.