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  • Dileepa Prabhakar 21:27 on June 30, 2009 Permalink | Reply
    Tags: DigitalPersona, Firefox, Firefox 3.5, , HDX18T,   

    DigitalPersona 4 and Firefox 3.5 

    HP recently made DigitalPersona 4 (4.0) fingerprint management software available for download on it’s support website. This version of DigitalPersona resolves two important issues with the software:

    • DigitalPersona 4 is compatible with Windows Internet Explorer 8
    • DigitalPersona 4 works great on Windows 7 (Release Candidate)

    Grab the 32-bit version here and the 64-bit version here.

    DigitalPersona 4 is also compatible with Firefox 3.0.x, but they weren’t prepared for Firefox 3.5, which has been in a long beta & RC phase and was released today. And now Firefox 3.5 reports that DigitalPersona 4 is incompatible with it.

    Now, I use the fingerprint login capability provided by DigitalPersona extensively and didn’t want to miss out either on this feature or on using Firefox 3.5. I had been using Firefox 3.5 pre-release versions with extension compatibility checker disabled, but didn’t feel like doing that with the release version.

    So I set out to see if I could get DigitalPersona 4 to work with Firefox 3.5 and I didn’t disappoint myself ;).

    Here’s what you should do to get it to work:

    • Close all open Firefox windows.
    • Open an elevated Command Prompt and navigate to the DigitalPersona Firefox extension folder (type command in Command Prompt):
    cd %programfiles%\DigitalPersona\Bin\FirefoxExt\

    • Open install.rdf in WordPad (type command in Command Prompt):
    write install.rdf

    • Change <em:maxVersion>3.1.*</em:maxVersion> to <em:maxVersion>3.5.*</em:maxVersion>
    • Make a note of the <em:id> value —  it was {ec8030f7-c20a-464f-9b0e-13a3a9e97384} on my computer.
    • Save and exit WordPad


    Update: Turns out there is an easy way to package this modified DigitalPersona Firefox extension and reinstall it in Firefox 3.5. Follow instructions in the highlighted post here and skip the steps listed below.

    • Navigate to your Firefox profiles folder (type command in Command Prompt):
    cd %appdata%\Mozilla\Firefox\Profiles\

    • If you have multiple Firefox profiles set up, you will find a number of sub folders here. But for most users, there should be just a single folder in the following format: <random_characters>.default. Navigate to that folder (type command in Command Prompt):
    cd *.default

    • Open extensions.rdf in WordPad (type command in Command Prompt):
    write extensions.rdf

    • Search for DigitalPersona Extension. Four lines below that, you should find something like this <NS1:targetApplication RDF:resource=”rdf:#$GyBtJ”/>. Note the RDF:resource value.
    • Scroll back up to the top of the file, place your mouse pointer on the first line and search for rdf:#$GyBtJ (i.e., the RDF:resource value you noted down in the previous step).
    • Ensure that the NS1:id in the next line matches with <em:id> noted from install.rdf above.
    • Change NS1:maxVersion=”3.1.*” to NS1:maxVersion=”3.5.*”
    • Save and exit WordPad

    DigitalPersona_Extensions_rdf_RDF-resource DigitalPersona_Extensions_rdf_version

    • Restart Windows and resume browsing in Firefox 3.5, now with DigitalPersona 4 fingerprint login enabled!
    • Randika 05:18 on January 2, 2010 Permalink | Reply

      • Dileepa Prabhakar 08:37 on January 2, 2010 Permalink | Reply

        Thanks, Radhika.

        DigitalPersona has since released an update that officially adds support for Firefox 3.5. Just run the DigitalPersona software updater to get the update.

    • Scott 18:12 on October 3, 2010 Permalink | Reply

      How would I alter the file to work with Namoroka now that a 64-bit flash player (Flash Square, I think it’s technically a beta) has been released?


    • teknophilia 15:16 on March 22, 2011 Permalink | Reply

      Wow, I know a few years have passed, but do you know how to get it to work with FireFox 4.0?

      • Dileepa Prabhakar 18:00 on March 22, 2011 Permalink | Reply

        Unfortunately, no. I’ve moved on from Firefox onto the super-fast Google Chrome and have given up the “comforts” of fingerprint based login.

        Does this trick not work with Firefox 4?

        • ralphrj 17:47 on March 25, 2011 Permalink

          Not able to get it to work with FF4 – I had to downgrade it back to 3.6.16

  • Dileepa Prabhakar 01:42 on September 3, 2008 Permalink | Reply
    Tags: Beta, Comparison, Firefox, Firefox 3.0, , , IE8, Internet Explorer, Memory, , Mozilla, Mozilla Firefox   

    Google Chrome, Mozilla Firefox and Microsoft Internet Explorer memory usage comparison. 

    Google Chrome has a cool built-in feature that lists the memory usage of all currently running browsers. This can be accessed by bringing up the Chrome Task Manager using Shift+Esc and then clicking on ‘Stats for nerds’. Or just type ‘about:memory’ into the Chrome Omnibar.

    So I thought I would do a simple memory usage comparison by opening my most frequently used web applications.

    Tab 1: Google Gmail (https://gmail.google.com)

    Tab 2: Google Reader (https://www.google.com/reader)

    Tab 3: Google Calendar (https://www.google.com/calendar)

    I opened the same 3 tabs in Google Chrome (beta), Mozilla Firefox 3.01 and Microsoft Internet Explorer 8.0 (Beta 2) and then opened the memory page in Chrome.  All three browser sessions were started afresh.

    Google Chrome Memory Usage (Click to enlarge)

    Google Chrome Memory Usage (Summary) (Click to enlarge)

    Looking at just the ‘Private’ memory column, IE8 is a memory hog while Chrome and Firefox use similar amounts of memory.

    I am pretty impressed at how well the Chrome beta works compared to IE8 beta 2.

    Download Chrome: http://www.google.com/chrome

    Download Firefox: http://www.firefox.com

    Download IE8 beta2: http://www.microsoft.com/ie8

    Chrome is currently available for Windows XP and Vista only. Mac and Linux versions are on the way.

    IE8 is available for Windows XP and Vista only.

    • David Gerard 01:54 on September 3, 2008 Permalink | Reply

      “We are so, so happy with Google Chrome,” mumbled Mozilla CEO John Lilly through gritted teeth. “That most of our income is from Google has no bearing on me making this statement.” – http://notnews.today.com/?p=57

    • coffee 22:38 on January 4, 2009 Permalink | Reply

      it will be interesting to see if Chrome can get as much market share as Firefox; for now they seem to have leveled off…

  • Dileepa Prabhakar 15:24 on January 30, 2008 Permalink | Reply
    Tags: Firefox, Minefield, Windows Vista   

    Firefox 3 UI pictures 

    I just updated to the latest nightly build of Firefox 3 beta (Minefield) and you can see the beginnings of the new theme for Vista coming up. A couple of pictures…

    Firefox 3 Beta (Minefield) -- new theme for Windows Vista.

    Notice the integrated Back and Forward buttons (Vista like). It actually looks more like the UI elements of early Windows Longhorn builds.

    Also notice that Home is no longer a button in the standard toolbar, but has instead been moved to the Bookmarks toolbar. I don’t like this since I usually turn off the Bookmarks toolbar so that I have more space for my web browsing. But it’s an easy fix to move the Home button back to the standard tool bar — right click on the standard toolbar->Customize->drag and drop the Home button from the Bookmarks toolbar to the standard toolbar.

    Home button moved to its rightful place in the standard toolbar.

    The ‘About’ dialog just for your reference.

    Firefox 3 About dialog

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