After briefly testing out Firefox 57 I immediately knew that this update was going to be a major problem for me so have reverted back to Firefox 56. From what I understand it is supposed to be twice as fast as previous versions which is good news but unfortunately the lack of support for so many great add-ons that work with Firefox 56 is disappointing. These were add-ons that made FF so functional and easy to use but also saved me a great deal of time. Without these Legacy add-ons being supported in FF57 the speed of the browser isn't going to help me get things done quicker. I wanted to contact Mozilla by email to recommend the add-ons I believe should be developed for future updates of the browser. At present I am happy with the way Firefox 56 works. It may not be the quickest browser, but I would not say it is that slow and with nearly all of the add-ons I have installed working as they should, this for me is still a great browser. As I intend to stick with FF56 for as long as possible my main concern now is to do with the security of this version because an outdated browser could become vulnerable to hacks, but I am also unhappy that the Legacy add-ons will no longer be developed to make them even better than they already are. I am aware that there is a list of recommended replacements for Legacy add-ons but most of these are unsuitable and of inferior quality. I would appreciate it if a moderator could provide me with an email address so I can contact the development team of the Mozilla Firefox to submit my recommendations. Thank you!