Note for the blog author: "It's interesting that Firefox startup time got consistently worse over time until Firefox 51." I believe you meant to write "until

Note for the blog author: "It's interesting that Firefox startup time got consistently worse over time until Firefox 51." I believe you meant to write "until Firefox 52." I think the usage of "until" would typically point out the exception to the rule, in this case Firefox 52 is the first version that is no longer slower than the previous.