Why extension disappear after restarting the browser (in developer mode)? - opera-extension

There are three extensions loaded in developer mode in Opera 45.0.2531.0 (PGO). After restarting the browser, two of them dissapeared. I do not see any significant difference between the manifest files. Have any ideas?

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Firefox not displaying PDF in primefaces p:media component on a remote server

I have a JSF application that uses Primefaces 7.0. Some of its pages use the p:media component to display the content of PDF files. When installed on a remote linux server, the application does not show the content of the PDF if used with Firefox 67.0. It works fine with Chrome and IE. And it works perfectly on my Windows 10 PC, even with Firefox. To make it even wierder, inspecting the element makes it visible in my laptop, but not in my desktop computer. Has anyone else a similar problem? Please advice.
EDIT 11/11/2019: Today I learned that the problem occurs when using https instead of http. Therefore, it doesn't really matter that the server is remote; what happens is that on our remote (and public) server we use https

check point ssl network extender installation mac os safari

SSL Network Extender fails to launch.
launching SSL Network Extender fails with "failed to download" on safari.
I think there is a solution but they do not share it public.
Does anyone have a solution for this?
In checkpoint user center Solution ID sk96108.
Thanks
EDIT: From the Safari 12 release notes:
Legacy NPAPI Plug-ins
Removed support for running legacy NPAPI plug-ins other than Adobe Flash.
This means that plugins such as Java and Silverlight will no longer work in Safari 12. This answer still works for Safari 11 and earlier. For a solution that works on newer versions, see this workaround (which uses an old version of Firefox).
Simply hold down "alt/option" and click on the Java trust settings for the relevant website, deselect "Run in Safe Mode", and click "Trust" in the dialog that pops up:
Source: Apple Support.

Chrome dev tools site gets stuck in mobile view when exiting emulation mode

When using chrome dev tools to emulate mobile devices, sometimes when toggling emulation from mobile back to desktop the user agent spoofing gets stuck in mobile. I've tried hard cache reset, closing browser completely, restore to default.... but anything I do the site still renders in mobile (even when emulation is turned off).
This happens in Canary, beta, and regular Chrome.
Also a note i've only seen this happen in Sharepoint.
Anyone know how to resolve? Nothing seems to get the dev tools to change user agent back to default when exiting emulation.
Have you tried deleting your chrome settings?
Windows: C:/Users/%username%/AppData/Local/Google/Chrome/User Data
Mac OSX: ~/Library/Application Support/Google/Chrome/
Ubuntu: ~/.config/chromium/
Also make sure you aren't ZOOMED! Gets ya everytime
I ran into this same problem previously when using dev tools in Chrome to look at mobile resolutions that got me permanently stuck in mobile for SharePoint only. I solved it originally with the recommendation above of deleting my Chrome settings folder, however, that meant I had to sign in again, sync my extensions, etc.
After forgetting that this would happen again, I ran into the same issue, but this time I discovered that if you append the following to your SharePoint URL it will reset this back to non-mobile. I verified that it is not temporary as I have closed my browser, reopened, visited SharePoint, and it still loads in desktop mode.
/?mobile=0
So, you would use your site url, e.g. https://siteurl/?mobile=0
Weird, this just started happening to me. It persists in new tabs and new windows. Only fix is to open DevTools and switch to Responsive mode and then pull it way out. As soon as I turn off Responsive / Mobile view, Chrome snaps right back to a mobile view by default (appears to be iPad size).
The solution for me (so far) was to quit Chrome and open it back up.

Bootstrap 3 navigation toggle button always appearing in IE11 (on remote server)

I'm experiencing a very strange behaviour with Bootstrap 3 when viewing in Internet Explorer. My nav bar works perfectly locally (I'm using VS2012, so the page is being served by IIS Express), but when I deploy it to one of our internal servers (running full IIS) it always appears collapsed (even if I stretch the browser across both my monitors!)
If I user Chrome, it works perfectly.
I've compared the files that are downloaded in each case, and they are identical. I have even create a test file which uses the example nav bar from the bootstrap website, and I see the same behaviour.
So, to summarize:
Local / IE Works
Local / Chrome Works
Remote / IE Does not work
Remote / Chrome Works
Any pointers about this very strange behaviour would be very much appreciated!
I found the problem, and it is Internet Explorer's compatibility settings.
Under Tools > Compatibility View Settings dialog there is a checkbox which says "Display intranet sites in Compatibility View".
This setting meant IE used an older rendering engine, which did not work very well with Bootstrap. Once it was turned off everything was fine.

IE 10 not using AppCache after browser closed

I wrote an application using the HTML5 Cache Manifest and I'm having a problem using it in IE 10.
I used Fiddler to witness the manifest file being downloaded and all resources fetched on the initial load of the application. If I disable my network adapter to force the machine offline, the application continues to work as expected as long as I don't close the browser window.
However, when I close the browser window, then attempt to re-open the page from a favorite, IE 10 tells me "You're not connected to a network". Obviously I know that, I'm trying to use the app offline. These exact steps work in Chrome.
Is this behavior by design? Is there a workaround? I can't test with IE 11 right now...is this different in IE 11?
Hearing of some issues of the appcache clearing if your company utilizes gpo settings and has "empty temporary internet files folder when browser is closed" enabled.
Did you find the answer to this? I have the same problem. I did get a bit further though. I found that if you go to the IE10 File menu option and tick Work Offline then try and access your cached app it loads the page but I still have an issue as it does not appear to be using the javascript file that should also be cached. All works ok on Google Chrome but our clients are restricted to IE so Chrome is not an option.