Unfortunately, Firefox has an insufficient buffer to decrypt data in the browser, please install the MEGA desktop app to download large files (or use Chrome)". So I tried Chrome and it worked,
GitHub - meganz/firefox-extension: The mega.nz Legacy Firefox extension (for Palemoon browser) development repo
Mega Now Works in Firefox with Official Add-on, Bypasses JavaScript File Writing Limitations
How to Speed Up Downloads and Uploads for Kim Dotcom's New MEGA When Using Firefox « Digiwonk :: Gadget Hacks
Pokemon Mega Firefox
MEGA extension 1.0.3 - Download for PC Free
MEGA extension 1.0.1 for Windows - Download
Mega Now Works in Firefox with Official Add-on, Bypasses JavaScript File Writing Limitations
Stream Mega Man Battle Network 6 - Play Online on KBH Games - Mozilla Firefox by Leo Bhandari | Listen online for free on SoundCloud