In Firefox when I open a new tab and type in a webpage or click on the homepage button, then change to anoter tab while I wait for it to load, it will load the site in the tab I've switched to instead of the tab that I initially put the address in. This is annoying as it replaces whatever I was working on when it incorrectly loads the new page in the wrong tab. I have a fairly slow internet connection through my phone's hotspot, so it can take a long time to load pages, which is why I try to load something in one tab while working on another.