Yes, this. While extensions are often the cause of high memory usage, it's not always the case, and immediately blaming extensions makes people accuse Mozilla o

Yes, this. While extensions are often the cause of high memory usage, it's not always the case, and immediately blaming extensions makes people accuse Mozilla of passing the buck. If you ever see someone complaining about Firefox's memory usage, looking at about:memory is always the first step you should tell them to take. The amount of information can be overwhelming but in extreme cases like this it's often fairly obvious what the problem is -- look for the biggest measurement! And if it's still not obvious after that, communicating with Firefox developers (e.g. by filing a bug) usually results in progress happening.