Thanks - we've actually moved away from using custom protocols, so in that respect, my original issue has now 'gone away'
I'll check out the Handlers policy anyway - just to see if it would have worked for us :-) Thanks James Pearson ________________________________________ From: Mike Kaply <[email protected]> Sent: 14 October 2020 16:25 To: James Pearson Cc: [email protected] Subject: Re: [Mozilla Enterprise] Problem with custom protocol handler in autoconfig file and ESR 68 Hope things are well. I had this in a folder to look at later, but I wanted to make sure you knew that I added Handlers support to policy, so you shouldn't need this anymore: https://github.com/mozilla/policy-templates/blob/master/README.md Mike On Tue, Oct 22, 2019 at 7:28 AM James Pearson <[email protected]<mailto:[email protected]>> wrote: Thanks - that workaround appears to work fine for me as well James Pearson Mike Kaply wrote: > > It's definitely a bug. It appears to be a timing issue with messing with > protocol handlers too early. > > Getting someone to look at it might be tricky since it's not necessarily a > supported mechanism. But here's a workaround to just do it later in the > startup process that works for me: > > Components.utils.import("resource://gre/modules/Services.jsm"); > > Services.obs.addObserver(function observer(subject, topic, data) { > // DO ANYTHING YOU NEED TO DO LATER IN STARTUP LIKE PROTOCOL HANDLERS > Services.obs.removeObserver(observer, topic); > }, "final-ui-startup"); > > I am going to see if I can figure out what caused it though. > > Mike > > > > On Mon, Oct 21, 2019 at 8:34 AM Mike Kaply > <[email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>>> > wrote: > I'm definitely investigating it as a bug. > > Mike > > On Fri, Oct 18, 2019 at 4:16 PM James Pearson > <[email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>>> > wrote: > I actually meant: "I can sort-of work around this problem ..." > > But I would still like to know if this a bug or something that can be fixed > in the autoconfig file > > Thanks > > James Pearson > ________________________________________ > From: Enterprise > [[email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>>] > on behalf of James Pearson > [[email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>>] > Sent: 16 October 2019 14:41 > To: Mike Kaply > Cc: > [email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>> > Subject: Re: [Mozilla Enterprise] Problem with custom protocol handler in > autoconfig file and ESR 68 > > I can't sort-of work around this problem by checking for a custom pref > in the autoconfig file - and don't set up the custom protocol handler if > this pref doesn't exist, but set this custom pref. On subsequent runs of > Firefox, as the custom pref exists and is set, the custom protocol > handler is set up > > This does mean that the custom protocol handler doesn't work on the > first run, but all works as expected on subsequent runs ... > > Is this a bug I should report - or is it something that should be > 'fixed' (somehow?) in the autoconfig file ? > > Thanks > > James Pearson > > James Pearson wrote: >> >> pdfjs.disabled is set to false >> >> Thanks >> >> James Pearson >> >> Mike Kaply wrote: >>> >>> That's quite strange. >>> >>> Are you sure you're not somehow accidentally turning it off? >>> >>> What do you see for the value of pdfjs.disabled when you go to >>> about:config? >>> >>> Mike >>> >>> On Tue, Oct 15, 2019 at 10:25 AM James Pearson >>> <[email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>><mailto:[email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>>>> >>> wrote: >>> This is really aimed at Mike Kaply ... >>> >>> Many years ago on this list, Mike provided the 'magic' to add a custom >>> protocol handler in an autoconfig cfg file - the archives of this list >>> don't go back to 2014, so I can't link to the original thread - but what >>> is needed is something like this: >>> >>> const Cc = Components.classes; >>> const Ci = Components.interfaces; >>> var extProtocolSvc = >>> Cc["@mozilla.org/uriloader/external-protocol-service;1<https://avanan.url-protection.com/v1/url?o=http%3A//mozilla.org/uriloader/external-protocol-service%3B1&g=Zjk4ODg3MjMyNDExMjcyNw==&h=NmU3M2RlZjZhNzMwYzhkMTI2OGI5MDA3YTk3OGE0MGUzOTZhZTAzYzRhYmViNzhiNjk0NjYwMjhmYjI3Zjg5Yg==&p=YXAzOnRlY2huaWNvbG9yOmF2YW5hbjpvZmZpY2UzNjVfZW1haWxzX2VtYWlsOjI0MTFjYTRjZjA5MTQyZDM2ZDQxODUxYmQ2Yzg5OTYzOnYx><http://mozilla.org/uriloader/external-protocol-service;1<https://avanan.url-protection.com/v1/url?o=http%3A//mozilla.org/uriloader/external-protocol-service%3B1&g=OWZjMzdhZjE4ZmU0MTM3ZQ==&h=ZTQ5OTZiNjZiOGYyMjE5NzA3YzA3NTZmMTI4MjU1NjUwNjRiMzlmNDRhOWY4Mjk4ZWVlOTMwNjk3MmM1YTRhNw==&p=YXAzOnRlY2huaWNvbG9yOmF2YW5hbjpvZmZpY2UzNjVfZW1haWxzX2VtYWlsOjI0MTFjYTRjZjA5MTQyZDM2ZDQxODUxYmQ2Yzg5OTYzOnYx>><http://mozilla.org/uriloader/external-protocol-service;1<https://avanan.url-protection.com/v1/url?o=http%3A//mozilla.org/uriloader/external-protocol-service%3B1&g=OTQ3ZGNmNDNhMjU4ODQyYQ==&h=YWFhY2Q0MTNmZTNmZjE3NTF iNzk5NjkzZmM1NmE5YTE2Y2VhY2M1MzVhN2NlZmI5NTY5NGViOTY3NjQwNTZjMQ==&p=YXAzOnRlY2huaWNvbG9yOmF2YW5hbjpvZmZpY2UzNjVfZW1haWxzX2VtYWlsOjI0MTFjYTRjZjA5MTQyZDM2ZDQxODUxYmQ2Yzg5OTYzOnYx>>"].getService(Ci.nsIExternalProtocolService); >>> >>> var handlerSvc = >>> Cc["@mozilla.org/uriloader/handler-service;1<https://avanan.url-protection.com/v1/url?o=http%3A//mozilla.org/uriloader/handler-service%3B1&g=NmFkMDExOTU1YjUxMGVlNg==&h=MGMwYWI4ZTk0NDkwZDljNjFiZWRlNWIyNTYzZjE2Y2EwYzk5YWZmZjg4NTNjYjM2ZDZlOTA3MDg0NzIxZWNmMg==&p=YXAzOnRlY2huaWNvbG9yOmF2YW5hbjpvZmZpY2UzNjVfZW1haWxzX2VtYWlsOjI0MTFjYTRjZjA5MTQyZDM2ZDQxODUxYmQ2Yzg5OTYzOnYx><http://mozilla.org/uriloader/handler-service;1<https://avanan.url-protection.com/v1/url?o=http%3A//mozilla.org/uriloader/handler-service%3B1&g=NzI5YzU5MWIzNzYzMThiYw==&h=N2U0YTNjZDk3MGJkNjcwMzllODc0NjI3ZmNjOGZhMDQyNWQ0NGViNTJmYzE3NTczNjU0OTIyYmFjYWUzZjI5Yg==&p=YXAzOnRlY2huaWNvbG9yOmF2YW5hbjpvZmZpY2UzNjVfZW1haWxzX2VtYWlsOjI0MTFjYTRjZjA5MTQyZDM2ZDQxODUxYmQ2Yzg5OTYzOnYx>><http://mozilla.org/uriloader/handler-service;1<https://avanan.url-protection.com/v1/url?o=http%3A//mozilla.org/uriloader/handler-service%3B1&g=MzUzZjdiMGRiODE3YzMwYw==&h=ZGY1MDQ0NDEyYTMzYmY3MjM2MWE2NWEyMDA3OTE0Y2UyMDJmODE1NGQzMDJiOTlmNWI4YmNlOWNhNzhlYzc 5NQ==&p=YXAzOnRlY2huaWNvbG9yOmF2YW5hbjpvZmZpY2UzNjVfZW1haWxzX2VtYWlsOjI0MTFjYTRjZjA5MTQyZDM2ZDQxODUxYmQ2Yzg5OTYzOnYx>>"].getService(Ci.nsIHandlerService); >>> >>> >>> var handlerInfo = extProtocolSvc.getProtocolHandlerInfo("yourprotocol"); >>> >>> var file = >>> Cc["@mozilla.org/file/local;1<https://avanan.url-protection.com/v1/url?o=http%3A//mozilla.org/file/local%3B1&g=YTkzNjQ5MWRlM2UzOWYzMA==&h=ZjJlMTNkMTk1YjBiM2NlZDM2M2FjOWUwMzVmMTVmZjExNTJjODJmODk3M2QxZTViYjA1MDQ0Mzg2NjVhNDZkMQ==&p=YXAzOnRlY2huaWNvbG9yOmF2YW5hbjpvZmZpY2UzNjVfZW1haWxzX2VtYWlsOjI0MTFjYTRjZjA5MTQyZDM2ZDQxODUxYmQ2Yzg5OTYzOnYx><http://mozilla.org/file/local;1<https://avanan.url-protection.com/v1/url?o=http%3A//mozilla.org/file/local%3B1&g=NTM3ZjRmMzRiNTI5MWZiYQ==&h=MTg3MzZhOWRmMzcyY2Y3ZmUxMmUxYzlkNjU1ZjM0Njk1ZTYwODY5N2ZiYjAyNWM3ZGFiYWYyZjBmYzA0ZDBlYg==&p=YXAzOnRlY2huaWNvbG9yOmF2YW5hbjpvZmZpY2UzNjVfZW1haWxzX2VtYWlsOjI0MTFjYTRjZjA5MTQyZDM2ZDQxODUxYmQ2Yzg5OTYzOnYx>><http://mozilla.org/file/local;1<https://avanan.url-protection.com/v1/url?o=http%3A//mozilla.org/file/local%3B1&g=NmViM2NhM2ZiYTJlNDFhMQ==&h=MmJkOTJlOTJhNTQ4NWQ3MzFiYjU5MWE2NGQ0NWQ4NTJiODJkMjJjYWNiOTFjY2Q5YjljN2I2ZmZkNTk4MjYxNQ==&p=YXAzOnRlY2huaWNvbG9yOmF2YW5hbjpvZmZpY2UzNjVfZW1haWxzX2VtYWlsOjI0MTFjYTRjZjA5MTQyZD M2ZDQxODUxYmQ2Yzg5OTYzOnYx>>"].createInstance(Ci.nsIFile); >>> >>> // This should be the path to the .app file on Mac or the EXE on Windows >>> file.initWithPath("/Applications/Preview.app"); >>> var localHandlerApp = >>> Cc["@mozilla.org/uriloader/local-handler-app;1<https://avanan.url-protection.com/v1/url?o=http%3A//mozilla.org/uriloader/local-handler-app%3B1&g=OThkN2EyZjkyOTM3ZTM5OA==&h=NTI0YWQzMGU4YjU1ZDlkNzVhZjA2ZWRhZDE5YmY1ODEyODViNTBiNGNlM2JkYWJlYzMyYTZlNWY3MTVkMzgwOQ==&p=YXAzOnRlY2huaWNvbG9yOmF2YW5hbjpvZmZpY2UzNjVfZW1haWxzX2VtYWlsOjI0MTFjYTRjZjA5MTQyZDM2ZDQxODUxYmQ2Yzg5OTYzOnYx><http://mozilla.org/uriloader/local-handler-app;1<https://avanan.url-protection.com/v1/url?o=http%3A//mozilla.org/uriloader/local-handler-app%3B1&g=ZGFmZmM2NmY0Yzk3MzJjNA==&h=YmQ4NGE0ODg2YjYwZjJmM2Y5ZWNiMjlmM2Y4MTRmOTI4Y2I2YTBlYTMzM2U3Yzg4Yjk3ZGU3OTI5OGI5N2IyNg==&p=YXAzOnRlY2huaWNvbG9yOmF2YW5hbjpvZmZpY2UzNjVfZW1haWxzX2VtYWlsOjI0MTFjYTRjZjA5MTQyZDM2ZDQxODUxYmQ2Yzg5OTYzOnYx>><http://mozilla.org/uriloader/local-handler-app;1<https://avanan.url-protection.com/v1/url?o=http%3A//mozilla.org/uriloader/local-handler-app%3B1&g=NTBjMzhlMWFmZTMwZTY5NA==&h=NjEwYmJkYTFjYmZkMzE0N2NhNDU5NjkwMTZiZDA4OTg2NTliMThlZTBlMDEyNDhmMWJlZmV jN2QyYWJjMmEyMA==&p=YXAzOnRlY2huaWNvbG9yOmF2YW5hbjpvZmZpY2UzNjVfZW1haWxzX2VtYWlsOjI0MTFjYTRjZjA5MTQyZDM2ZDQxODUxYmQ2Yzg5OTYzOnYx>>"].createInstance(Ci.nsILocalHandlerApp); >>> >>> localHandlerApp.executable = file; >>> // The name that will be shown in preferences. >>> // Not used on Mac >>> localHandlerApp.name = "Preview"; >>> handlerInfo.possibleApplicationHandlers.appendElement(localHandlerApp, >>> false); >>> handlerInfo.preferredAction = Ci.nsIHandlerInfo.useHelperApp; >>> handlerInfo.preferredApplicationHandler = localHandlerApp; >>> handlerInfo.alwaysAskBeforeHandling = false; >>> handlerSvc.store(handlerInfo); >>> >>> This has worked fine ever since for us - and works with ESR 68 - >>> however, it appears to 'break' the built-in PDF viewer >>> >>> If I create a new profile with a custom protocol handler defined in the >>> autoconfig (as above), then the built-in PDF viewer isn't used - you're >>> given the option to open the PDF file in an external viewer instead >>> >>> Looking at the Preference Setting for PDF, it is set to 'Always ask' - >>> changing this to 'Preview in Firefox' just brings up a Save dialog when >>> clicking on a link to a PDF file >>> >>> (The custom protocol handler works fine) >>> >>> However, if I create a new profile with an autoconfig that doesn't have >>> a custom handler defined, start Firefox with that new profile, then quit >>> Firefox. Then restart Firefox (using the same profile), but this time >>> using an autoconfig that has the custom handler defined, then the >>> built-in PDF viewer works as expected ... as does the custom protocol >>> handler >>> git push > >>> i.e. defining a custom protocol handler on the first run of Firefox >>> appears to interfere with/break the built-it PDF viewer >>> >>> This is with Firefox ESR 68.1 on Linux >>> >>> Any idea what I can do to prevent this happening ? >>> >>> Thanks >>> >>> James Pearson >>> _______________________________________________ >>> Enterprise mailing list >>> [email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>><mailto:[email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>>> >>> https://mail.mozilla.org/listinfo/enterprise<https://avanan.url-protection.com/v1/url?o=https%3A//mail.mozilla.org/listinfo/enterprise&g=OTE0ZTQ0MWJkODQyM2QzOA==&h=ODRiMzgzZTViYjBlMjZhODBhYzBhZDZiM2U5MWM4MzRkOThiNWE1OGRmZjQyMDgzYjViYzcxYjI0MzUyNjMzZA==&p=YXAzOnRlY2huaWNvbG9yOmF2YW5hbjpvZmZpY2UzNjVfZW1haWxzX2VtYWlsOjI0MTFjYTRjZjA5MTQyZDM2ZDQxODUxYmQ2Yzg5OTYzOnYx> >>> >>> To unsubscribe from this list, please visit >>> https://mail.mozilla.org/listinfo/enterprise<https://avanan.url-protection.com/v1/url?o=https%3A//mail.mozilla.org/listinfo/enterprise&g=NTNiZTk2MGVkNjcwMTdmMA==&h=NTcyZWUzNDg4N2Q5ZDA4YWVlYTY3YjdiMTlmZTdiNjY2MDgzZTA0NjI4ZDA2ZjMxNDkwYTFkOTZjOTAwZWZkOA==&p=YXAzOnRlY2huaWNvbG9yOmF2YW5hbjpvZmZpY2UzNjVfZW1haWxzX2VtYWlsOjI0MTFjYTRjZjA5MTQyZDM2ZDQxODUxYmQ2Yzg5OTYzOnYx> >>> or send an email to >>> [email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>><mailto:[email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>>> >>> with a subject of "unsubscribe" >>> >> >> _______________________________________________ >> Enterprise mailing list >> [email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>> >> https://mail.mozilla.org/listinfo/enterprise<https://avanan.url-protection.com/v1/url?o=https%3A//mail.mozilla.org/listinfo/enterprise&g=MGJkNGE1MWQwMmQwZTMzZA==&h=MjAwNTg0N2YzMjRmYmUwYWUzMTJkZDYzYzI3YjEwMWVkYzExYmQxODhhY2RlZWI3ODg2OWViNjU3MWE1MzE4ZA==&p=YXAzOnRlY2huaWNvbG9yOmF2YW5hbjpvZmZpY2UzNjVfZW1haWxzX2VtYWlsOjI0MTFjYTRjZjA5MTQyZDM2ZDQxODUxYmQ2Yzg5OTYzOnYx> >> >> To unsubscribe from this list, please visit >> https://mail.mozilla.org/listinfo/enterprise<https://avanan.url-protection.com/v1/url?o=https%3A//mail.mozilla.org/listinfo/enterprise&g=NDhkNzQxOGIyYzljYmVjMg==&h=MTBmNTFmZjFjZmQ2OWQ2MWY3ZGVkZGY5NTU4NWE2ZWEzNDlmYzRlNDFlZmE4OWQyN2M0ZWQ3MmU2MWM3OTYwOQ==&p=YXAzOnRlY2huaWNvbG9yOmF2YW5hbjpvZmZpY2UzNjVfZW1haWxzX2VtYWlsOjI0MTFjYTRjZjA5MTQyZDM2ZDQxODUxYmQ2Yzg5OTYzOnYx> >> or send an email to >> [email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>> >> with a subject of "unsubscribe" > > _______________________________________________ > Enterprise mailing list > [email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>> > https://mail.mozilla.org/listinfo/enterprise<https://avanan.url-protection.com/v1/url?o=https%3A//mail.mozilla.org/listinfo/enterprise&g=NjI0MjFkZDM1M2Q3NGQzOQ==&h=MGI5NmJiN2ZmODdhZTYyNzBkOTljODEyZjY4YzRiYWI1YTc2OWMzYWVlM2ZlYzdlZTM2OGRiM2Y2NTYwNWVmZA==&p=YXAzOnRlY2huaWNvbG9yOmF2YW5hbjpvZmZpY2UzNjVfZW1haWxzX2VtYWlsOjI0MTFjYTRjZjA5MTQyZDM2ZDQxODUxYmQ2Yzg5OTYzOnYx> > > To unsubscribe from this list, please visit > https://mail.mozilla.org/listinfo/enterprise<https://avanan.url-protection.com/v1/url?o=https%3A//mail.mozilla.org/listinfo/enterprise&g=MWJmODk2ZjFlMzVhMjExMw==&h=NWZkNmZlZGI2NjY2YWUzNzYyOTJiZjcxOGZkMjk0ZmMyMjNkMzc5YzY3ZDRlMGQxMWU5NDdlNThmOGJiMWYyOQ==&p=YXAzOnRlY2huaWNvbG9yOmF2YW5hbjpvZmZpY2UzNjVfZW1haWxzX2VtYWlsOjI0MTFjYTRjZjA5MTQyZDM2ZDQxODUxYmQ2Yzg5OTYzOnYx> > or send an email to > [email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>> > with a subject of "unsubscribe" > _______________________________________________ Enterprise mailing list [email protected] https://mail.mozilla.org/listinfo/enterprise To unsubscribe from this list, please visit https://mail.mozilla.org/listinfo/enterprise or send an email to [email protected] with a subject of "unsubscribe"
