Hey guys might sound weird but how can I change default icon in favorite plugin LOL?

I tried changing  ex: fa xx to fa xxy  but it just stops it's functionality, any help?

 

@slicer
Rather change via :before

I did, I changed this:
ex:
a.fi_save_favorite.fi_save:not(.is_favorite) i.fa-bookmark:before {content:"\f097";}
to

a.fi_save_favorite.fi_save:not(.is_favorite) i.fa-heart:before {content:"\f004";}
and or

in favorites function.php:

else {
      $icon = 'fa-bookmark';
      $title = __('Saved', 'favorite_items');
to

else {
      $icon = 'fa-heart';
      $title = __('Saved', 'favorite_items');
and it becomes unusable and buggy... 

@slicer
if you change it via :before, there is no need to change classes anymore.

Hi guys, I request your help please:
I tried to change the ugly favorite bookmark icon for the beautiful heart, I worked on the stela theme's style.css, changed the icons in font-awesome.css, variables.less, made hundreds of combinations, but there was always something that stopped it from working.

Style.css
a.fi_save_favorite.fi_save.is_favorite i.fa-bookmark-o:before {content:"\f08a";}
a.fi_save_favorite.fi_save:not(.is_favorite) i.fa-bookmark:before {content:"\f004";}
https://prnt.sc/lxqnkb


url: www.buscobarato.cl
Theme: Stela 1.1.1
Favorite Items: 1.1.4

best regards

You have to check plugin js as well.