While Chrome is most people's favourite browser and Edge is the browser most used to download other browsers, Mozilla's Firefox has just been updated to version 54. The focus of this release was knocking over 32 bugs that were potentially exploitable by attackers.
As well as fixing a bunch of vulnerabilities, Mozilla has improved memory usage and performance. The browser can now process up to four content streams at the same time so pages load faster. This is critical as they say the average website is about as big as the entire original version of Doom.
E-Hacking news goes through some of the detail around the specific CVEs that have been fixed in this latest release.