Instead of downgrading to an older, insecure version of Firefox and changing your update settings, you should consider these alternatives: Install Firefox Extended Support Release. Firefox Extended Support Release (ESR) is an official version of Firefox developed for. Sometimes, the latest version of an app may cause problems or not even work. While the developer is fixing the problem, try using an older version. If you need the previous version of Firefox Portable, check out the app's version history which includes all versions available to download. Download prior versions of Firefox Portable for Windows.

• Be careful with old versions! These versions are displayed for testing and reference purposes.

  You should always use the latest version of an add-on.

• Version 4.7

  Works with firefox 57.0 and later

  • Added support of First Party isolation (FPI). AVD can now download videos when FPI is on, as well as using the Tor browser
  • Scoring system updates: detection of segments and previews suppressed, fixed video downloads
  • HLS protocol: full path to playlist added to configuration dialog. Helps distinguishing different qualities when media playlists are all have the same filename
  • Native app: fixed bug in HLS protocol when demuxer.txt file was not deleted
  • Native app: when downloading videos in Private mode, the previously used folder is remembered and proposed for the next download
  • Native app: ffmpeg version updated to 4.2.2 (helps with some Vimeo videos)

  Source code released under All Rights Reserved

• Version 4.6

  Works with firefox 57.0 and later

  Source code released under All Rights Reserved

• Version 4.5

  Works with firefox 57.0 and later

  • Fix to reduce NA processes stack up
  • New feature: UI: added buttons for opening temp files directory (top level and this session)
  • New feature: UI: added buttons for opening temp files for each video
  • Bugfix: video is not downloaded when title consists only of ' char (consists only of forbidden chars)
  • UI: fixed display of size of very large files, updated header, updated copyright year, added 'video merging' state to Media page
  • Scoring system: suppressed segments detection, suppressed service mp3 files (beeps)
  • HLS protocol: up to 5 segment download can fail. Used in some playlists with fake segments (pseudo-segments for reporting stats)
  • HLS protocol: fixed bug when playlists contains mix of encrypted/non-encrypted segments
  • Small bugfixes

  Source code released under All Rights Reserved

• Version 4.4

  Works with firefox 57.0 and later

  • New MPEG-DASH protocol handler, which supports segment timelines
  • New fast and lightweight scoring system engine
  • MPEG-DASH and Vimeo videos are downloaded in separate threads (audio and video) which speeds up downloads
  • Support of MPEG-DASH and Vimeo videos without audio stream
  • Various bugfixes

  Source code released under All Rights Reserved

• Version 4.3

  Works with firefox 57.0 and later

  Source code released under All Rights Reserved

• Version 4.2

  Works with firefox 57.0 and later

  Source code released under All Rights Reserved

• Version 4.1.25

  Works with firefox 57.0 and later

  • Native app installer is now dual-purpose and can be installed machine-wide for all users (ALLUSERS=1)
  • Youtube: bugfix quality is not updated when change it in the player
  • Youtube: autopreselect of best quality
  • Scoring: bugfixes, new MPD segments avoidance rule

  Source code released under All Rights Reserved

• Version 4.1.24

  Works with firefox 57.0 and later

  • Added support of web browsers UC Browser, Waterfox, Comodo IceDragon
  • UI: Popup: added badge over menu button with count of currently running downloads
  • UI: Downloads page: increased font size of list of downloads
  • HLS protocol: fixed detection bug
  • YouTube: advertisement videos are avoided

  Source code released under All Rights Reserved

• Version 4.1.19

  Works with firefox 57.0 and later

  • Added banners to remind when native app is not installed or requires update
  • Updated UI
  • Added Clear list feature
  • Fixed detection on several web-sites
  • Bugfixes

  Source code released under All Rights Reserved

• Version 4.0.12

  Works with firefox 57.0 and later

  Don't forget to update Native app to version 4.x to get all new features enabled.
  In this release:

  • Popup is back
  • New features: Show on disk, Play with default player, linear percentage-based progress
  • Scoring videos are downloaded by default with Native app if it is installed

  Source code released under All Rights Reserved

• Version 3.5.65

  Works with firefox 57.0 and later, android 57.0 and later

  Source code released under All Rights Reserved

• Version 3.5.62

  Works with firefox 57.0 and later, android 57.0 and later

  Source code released under All Rights Reserved

• Version 3.4.57

  Works with firefox 57.0 and later, android 57.0 and later

  Source code released under All Rights Reserved

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Firefox is a free open source web browser that is a continuation of the Mozilla Application Suite and uses the Gecko rendering engine. Firefox has numerous popular features including tabbed browsing, spell checking, and the ability to add numerous community developed plugins.

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