How to Make Firefox Load Faster



Firefox may run quickly but it loads slowly; here's how to fix it.

(This tip is for experienced computer users only.)

You can slash Firefox's slow load time by compressing the DLLs and executables. There are many choices for compression but I suggest you use UPX which is free, efficient and time proven.


  1. Download UPX from
  2. Unzip upx.exe into your Firefox installation folder which is normally C:\Program Files\Mozilla Firefox.
  3. Make sure Firefox is not running then shell to a command prompt in the Firefox installation directory.
  4. Type in the following command in a single line and hit return:

    for %v in (*.exe *.dll components\*.dll plugins\*.dll) do upx "C:\Program Files\Mozilla Firefox\%v"
  5. If on some later occasion you want to unpack the files, just type in the command above but add the decompression switch "-d" after "do upx."


That's it; enjoy the difference!


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I didn't understand what you meant when you said "then SHELL to a command prompt in the Firefox installation directory"

Thank you