1305782 - Firefox 48.02 & 49.0 config file seems to get corrupted disallowing pop up windows and forcing update installs when "do not update is selected"

Status: RESOLVED DUPLICATE of bug 1234700

(Core :: DOM: Core & HTML, defect)

Description

[smithtm]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0
Build ID: 20160817112116

Steps to reproduce:

Several internal web apps that have worked with FireFox for over 7 plus years are no longer working properly since FireFox ver.48.02 for MS Windows7. I believe this could be a configuration file structure change, meaning that the structure may have been altered but firefox has old code that reads/writes to the old structure corrupting the file. Staff notified us regarding the problem with applications no longer working properly. The applications use standard JavaScript "window.showModalDialog( params... )" function. No Pop Up windows work.  


Actual results:

Applications using standard JavaScript "window.showModalDialog( params... )" function pop up windows are blocked. Config screen "Options" shows pop ups are not blocked. Toggling the "block pop ups" has no effect. Installing a prior FireFox version and running a "refresh" FireFox solves the problem, however, in the config "Options -> Advanced -> Update -> Never Check for Updates" set TRUE ( only to prevent this version problem ), After a while, FireFox will update it's self any way stopping our staff work again and again throughout the day.


Expected results:

Config screen "Options" should be the control for FireFox behavior. Setting or clearing "Block Pop ups Windows" under "Options -> Content -> Block Pop Up Windows" should be the control to allow or disallow pop up windows but, it doesn't. Setting an exception site allowing pop ups doesn't not work either. Setting "Options -> Advanced -> Update ->Never Check for Updates" should prevent FireFox updates from being applied but, they are applied after a while regardless. Please help, we do not want to switch to another browser -- Thanks in advance - Tom

Comment 1

[smithtm]

Found it --- Looks like window.showModalDialog function is no longer a function of FireFox....  Was this intentional?  Mozilla is no longer going to support window.show.ModalDialog?  Please let me know - Thanks

Comment 2

[Justin Wood (:Callek)]

It is deprecated now, c.f. https://developer.mozilla.org/en/docs/Web/API/Window/showModalDialog

Comment 3

[smithtm]

Left with NO choice, no real warning, after more then 7 years with business apps DISABLED - moving to Internet Exploder  :(

Comment 4

[Ian Neal]

(In reply to smithtm from comment #3)
> Left with NO choice, no real warning, after more then 7 years with business
> apps DISABLED - moving to Internet Exploder  :(

Warnings would have been in the Error Console since Firefox 28 or 29

Not sure showModalDialog is supported in Edge either...

You might find https://www.tjvantoll.com/2012/05/02/showmodaldialog-what-it-is-and-why-you-should-never-use-it/ of use