I've tried to get the Chrome extensions Facebook history-deleting tools to work and noticed that Facebook is prone to using generated gibberish instead of actua

I've tried to get the Chrome extensions Facebook history-deleting tools to work and noticed that Facebook is prone to using generated gibberish instead of actual CSS class names. I wasn't sure if that was simply a part of/side effect of their minifaction process, or if it's intentional. In any case, they seem to periodically change the gibberish class names that the Javascript targets, breaking all the tools that try to simulate user actions on the FB website. Will this extension fall prey to the same fate?