Can you see if this question offers help to your issue?

Basicaly you should delete the mimeTypes.rdf file in your profile folder when Firefox is closed. Chances are the file’s default settings are not restored properly after uninstalling a PDF plugin or add-on. However make sure there is no setting in any Adobe product that causes its plugin to be enabled and take precedence over the Firefox setting for PDF files in the Applications section.

As far as I know, PDF should open in the same tab by default, and it does so for me when Preview in Firefox is selected so if otherwise, it may happen because of an installed plugin (i.e. the current situation.) Could you report back if this is not the case?

Hi.

What you are looking for in "Options/Preferences -> Applications" is "Portable Document Format (PDF)".

If Firefox doesn't open the PDF file at all, but offers to download the file then this usually means that the sends sends the file with a generic or otherwise unsupported content type (i.e. not application/pdf).

If the server specifies a target window then Firefox will open the file in a new tab or new window. You can divert this action to the same tab, but this will affect all links with a target attribute.

See:

• http://kb.mozillazine.org/browser.link.open_newwindow
• 1: current tab; 2:new window; 3:new tab;

For links opened via JavaScript you can look at this pref:

• http://kb.mozillazine.org/browser.link.open_newwindow.restriction

You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.

• http://kb.mozillazine.org/about:config

Tonnes said

Can you see if this question offers help to your issue? Basicaly you should delete the mimeTypes.rdf file in your profile folder when Firefox is closed. Chances are the file’s default settings are not restored properly after uninstalling a PDF plugin or add-on. However make sure there is no setting in any Adobe product that causes its plugin to be enabled and take precedence over the Firefox setting for PDF files in the Applications section. As far as I know, PDF should open in the same tab by default, and it does so for me when Preview in Firefox is selected so if otherwise, it may happen because of an installed plugin (i.e. the current situation.) Could you report back if this is not the case?

Hi, Thanks for the answer:)

I deleted all adobe products from control panel, then deleted Default window application:- Reader, as it was taking over to others after deleting adobe, when I deleted Reader then I deleted MimeTypes.rdf after closing Firefox-- In the end - default PDF opener was TWINUI- which is also windows default- and I can delete it, and I dont know How to change its settings so firefox can even display "Preview in Firefox" option next to pdf. please let me know if I can do some other thing with it.

cor-el said

Hi. What you are looking for in "Options/Preferences -> Applications" is "Portable Document Format (PDF)". If Firefox doesn't open the PDF file at all, but offers to download the file then this usually means that the sends sends the file with a generic or otherwise unsupported content type (i.e. not application/pdf). If the server specifies a target window then Firefox will open the file in a new tab or new window. You can divert this action to the same tab, but this will affect all links with a target attribute. See:

• http://kb.mozillazine.org/browser.link.open_newwindow
• 1: current tab; 2:new window; 3:new tab;

For links opened via JavaScript you can look at this pref:

• http://kb.mozillazine.org/browser.link.open_newwindow.restriction

You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.

• http://kb.mozillazine.org/about:config

Hi,

thanks for your answer, this have worked as per required. Thanks alot