I used to be a die-hard Firefox user, but over the last 15 years software quality has improved, expectations have been raised, and I haven't felt that Firefox has kept up. It still <i>feels</i> like it's a re-skinned 2005 era piece of software. Placing it next to Safari, Chrome, or more recent competitors like Arc, it feels dated.<p>There are technical reasons for this, there are process/political/human reasons why it has stayed this way, and for many people it's not a big enough issue to switch, or other things take priority, but for me it just comes down to <i>jankiness</i>. Alternative browsers all have their own issues, none are perfect, but most feel less janky at their core.