Load Your Own Translation Files First
Looks for custom .mo files in wp-content/languages/custom/ before the official ones, so your edited translations of a plugin or theme survive updates.
Snippet Library
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Set the Maximum Upload Size for the Whole Network
Overrides the network's "Max upload file size" setting from code, so every site gets the same per-file limit regardless of what is stored in the database.
Turn Off Fluent Forms Default Styles
Stops Fluent Forms loading its default stylesheet, so forms inherit your theme's form styling or your own CSS without overrides.