Even with a clean Eaglercraft 1.8.8 Download Google Drive -FREE- file, you might encounter issues.
Error 1: "Failed to load world data."
Error 2: "White screen after loading bar reaches 100%." Eaglercraft 1.8.8 Download Google Drive -FREE-
Error 3: "Cannot connect to server."
Once you have the Eaglercraft1.8.8_Offline.html file from Google Drive, launching the game takes 5 seconds: Even with a clean Eaglercraft 1
Note for Chromebook Users: You do not need Linux or Developer Mode. Just open the HTML file in Chrome. If it asks for "External Protocol Request," click "Open."
This is a grey area.
Verdict: Do not use this to avoid buying Minecraft if you have the means to purchase it. Use Eaglercraft to play on school computers or work PCs where you cannot install software.