Esther Schindler writes "Feeling a little overwhelmed by changing web standards and new browser choices? You aren't the only one. Mozilla is launching development tracks for the next two editions of its Firefox Web browser immediately, with hopes to push both into general release before the end of the year. This while Microsoft previews Internet Explorer 10 on the heels of its IE9 release, and Google projects Chrome 13 just one year after Chrome 7. Meanwhile, HTML5, the next version of the Web's primary language, appears to have entered a permanent gestation phase. Writes Scott Fulton: All the confusion has prompted Web developers to ask this question: What do we develop our sites against now?"