Firefox Portable (32/64-bit) 48.0.2

"The feel is slightly slower than Chrome or Opera, but not enough that it should irritate you. It uses fewer resources than Chrome or Opera, spawning only a single process, and using only 510MB of memory. Only the super-thrifty Safari used less memory." —Jon L. Jacobi, PCWorld.com (Sep 17, 2014 3:32 AM)

"Firefox has upped its game, with a great new look, fast performance, ingenious navigation features, and innovative Web technologies." —Michael Muchmore, PCMag.com

"Don't understand why it crashes so often." —funshinebear12 (a user),
download.CNET.com (April 26, 2015)

Mozilla Firefox is a fast, full-featured Web browser. Firefox includes pop-up blocking, tab-browsing, integrated Google search, simplified privacy controls, a streamlined browser window that shows you more of the page than any other browser and a number of additional features that work with you to help you get the most out of your time online.

FirefoxPortable_48.0.2_English.paf
Size: 112 MB (117,510,144 bytes) Packed Size: 53.3 MB (55,889,920 bytes)
MD5: 6F39BC7960261D921F04D00A34464350

Firefox64Portable_48.0.2_64_bit_English.paf
Size: 125 MB (131,608,576 bytes) Packed Size: 55.5 MB (58,195,968 bytes)
MD5: EE3A1412EA4E9B5CDEB3C622882760A8

Notes (included in the help.htm):
» You can get newer Flash player portable build at PCR’s notepad blog.
» Java/JRE portable (32/64-bit) are available from PortableApps.com.
» Silverlight portable (32/64-bit) are available on our ThumbApps blog.
» More in the help.htm...

Additional notes:
» Firefox will be *plugin-less* in the near future—and that means Flash player will also be replaced with Web standard—read more about it here: "NPAPI Plugins in Firefox."
»  Since version 46: 
  › 32-bit version can detect Flash player but won't play it. Java and Silverlight still works.
  › 64-bit version can't detect Java, but can play Flash and Silverlight.
  Hmm... Why do Mozilla do this...?
» Use Waterfox if you want all NPAPI plugins work.[]