Browser freezing if large string replace

If you have that many, you should probably use Locale instead as although String Overrides is great for a few string replacements, it will effect performance negatively if you have that many. Like it says on the project page:

Note that this is not a replacement to Locale as having thousands of overrides can cause more pain then benefit. Use this only if you need a few easy text changes.

Hopefully that helps! We could split it up into a couple pages, but having it one page reminds the user that the more String Overrides you use, the more times the string will be checked for each hit on t(). Thanks!