Modern Chrome and Edge are secure, but they cannot download videos without extension workarounds. The is a specialized tool—a hammer for the specific nail of "fast video download."
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Old versions of UC Browser (specifically UC Browser Mini or versions 12.x.x) were under 15MB. They featured cloud acceleration and data compression, making them perfect for 2G and 3G networks. The new version is over 80MB and drains your battery. Uc Browser - Fast Video Download Old Version