If only Mozilla hadn't wasted all that time and money and created a Chrome-comparable in stability/performance and Vivaldi-comparable in customization, we could've have an easy way out of this current mess...
(v3 drops not only ad-blockers but also user style managers, so a significant degradation of the web interfaces)
I daily drive Firefox. I haven't found a single website in years that's made me open Chrome. There's nothing slow about Firefox.