User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7b) Gecko/20040316 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7b) Gecko/20040316 In Netscape versions through 4.x, specifying an external image viewer in the list of helper applications (and associating it with the correct MIME types and file extensions, of course) would cause Netscape to open images of the specified types in the viewer under two circumstances: 1) clicking a link that pointed to an image file, 2) right-clicking an in-line image in a rendered web page and selecting "View Image" in the context menu. In all versions of Mozilla that I have used, the helper application entries are ignored, and images are opened in the browser window. I saw the file "mimetypes.rdf" mentioned in another bug report in a way that suggested that this file is where information about helper applications is stored. I saw no applications listed at all in my copy of this file. In fact, the only place I could find find my image viewer listed (and I did a text search in the Mozilla and user profiles folders, and a search through the registry) is this one line in prefs.js: user_pref("editor.image_editor", "C:\\Programs\\Graphics\\i_view32.exe"); The Image viewer I'm using is IrfanViuew, available at http://www.irfanview.com/ It is the registered application to open GIF, JPEG, and PNG images, among others. Additionally, I have unchecked all inage types in preferences/Advanced/System/ Windows Should Use Mozilla to Open These File Tyes: Reproducible: Always Steps to Reproduce: 1. Download and install I-view 3.85 and the plugins package for it from http://www.irfanview.com/ Open the preferences dialog, choose the Extensions tab, click the "Images Only" button, then "OK". 2. Open the Mozilla Preferences dialog, uncheck all the image types under Advanced/System. Then go to Navigator/Helper Applications. If I recall correctly, it will be necessary to create new entries. Click "New type to create these three entries: image/jpeg, JPEG Images, jpg; image/gif, GIF Images, gif; and image/png, PNG images, png. Select "Open it with..." for all three, and point this dialog to your installed copy of i_view32.exe. Click "OK" to save changes. 3. Go to any web page that contains images, right-click an image, and select "view Image" from the context menu. Alternatively, find a link that points to an image file and click it, or enter the URL of an image file in the location bar. Actual Results: The image opens in the browser window. The image viewer app does NOT open. Expected Results: Well, desired results, anyway: The image opens in my prefered viewer, which also has many editing capabilities so that I may enlarge small images, lighten dark ones, etc. I believe I began using Mozilla 1.3. I've used it on three OS's (Win98, Win2K, and WinXP), and two hardware platforms (Pent 166MHz MMX, Pent III 650), and this behavior has been consistent throughout. I have found no setting (including choice of themes) that makes any difference. Previously I was using Netscape 4.7(9?), and imported the profile (including the working helper app specifications) into Mozilla. When Mozilla failed to open image files in the external viewer, I deleted and recreated the helper app entries, to no avail. Considering that this feature was available in Netscape, I'm considering it to be a bug rather than a feature request. I'm calling it major, becausde it is an important feature to me (might be trivial to someone else, YMMV). My current workaround, which is to save the image file, open it in the viewer, and then delete the file when finished, is a significant PITA. Thanks for your help

*** This bug has been marked as a duplicate of 58554 ***