This addon is close to perfect, except for some reason it is enabled on all sites, and your only option is to list the sites you want to exclude it from - it really needs an option for the opposite behaviour (off by default, but enabled for specific sites).

Jorge if you're still reading these, please add that option!

Past that it would be nice to have some some basic options to exclude/include specific element names/classes to lock onto too, some pages have a lot of clickables and it would be nice to filter them out (possibly speeding up the rendering too).