This is a different issue, and a somewhat embarrassing one from a code perspective.
Sometime after the last big sale (but before now, obviously) I added a feature where if something on your wishlist had a discount, it would grab that store's page and parse out the discount announcement. So for example if something on your wishlist were a daily deal, it would say "DAILY DEAL!" in blue on your wishlist as well.
Fast forward to now - almost everything is on sale so when you load your wishlist it has to grab X number of store pages, where X is essentially the number of games on your wishlist. For example, if you have 100 games on your wishlist, ES will pull 100 store pages to parse out the discount announcement, which typically crashes your open tab.
I love you guys too! This a great community of like-minded Steam fanatics.
No worries, I just published a fix (6.3.3) for Chrome. Working on the Firefox fix now and it should be done in a few minutes.