At times when I open Firefox I have an intent on going to a specific website. I use a password manager and select the site I wish to go and log in, yet SD will start auto updating and grab focus which causes the intended navigation to fail. In addition, there are times a web link in an email is selected yet SD will be auto updating and will focus on the updating dial and load the website in the updating dial instead of the main browser window. A simple refresh will fix the dial, however that wasn't the intent of selecting the link in the email.
Please considering adding a Firefox startup auto update countdown delay timer setting. A setting to delay the auto update upon browser startup by X time, perhaps seconds or minutes. This would allow intended startup goals to be accomplished before SD starts grabbing focus with auto updating.
Customer support service by UserEcho