Sandboxie-Plus 1.16.4 / Classic 5.71.4 has been released on October 2nd, 2025. This version introduces a new protection option that blocks non-administrative instances of the session leader, such as Sandman.exe or Sbiectrl.exe, from accessing encrypted box data. This safeguard is enabled by default, though it can be disabled by setting ProtectAdminOnly=n if required. In addition to this enhancement, the release resolves a critical issue where Sandboxie-Plus 1.16.3 failed to connect to the driver on Windows Preview Build 27943, as tracked in issue #5003. Stability has also been improved with a fix for crashes related to the latest Signal client. Furthermore, the internal checks in Thread_CheckObject_CommonEx have been strengthened to provide more robust handling of encrypted boxes. This update continues the project’s focus on reliability, compatibility with evolving Windows builds, and stronger data protection. Download: https://github.com/sandboxie-plus/Sandboxie/releases/tag/v1.16.4
Hi David, Just installed this new SB+ version on 2 boxes, win 10 and win 7, both show the same behavior. Firefox browser opens in a red hardened sandbox, but when I close it, it tries to empty the sandbox and just hangs, searching for a directory with ??. Same behavior on both OS, I hit cancel and a couple of times the whole gui just crashed, this is just a quick "heads up" seeing if u can reproduce or anyone else has this issue. Thnks!
A little more testing and this new condition for me is sorta solved by running the program in admin mode. It seems by not restarting it in admin, it has permission conflicts with my sandbox files. I am operating in an encrypted box. My question is: Does running this in admin mode make any differences to security of the sandbox and if so, do I have any options? (i.e. - relocated any files or boxes). I guess it's pretty obvious I have never had to run admin mode before til this build. Thanks much!
I'm strongly considering paying for sandboxie plus. Is there a way to pay for it per year or per month as a reoccurring thing without supporting paytreon? which supporter certificate includes all the paid features? It would be helpful to have a chart that shows what has what does the encryption pack allow me to set a custom DNS over HTTPS for specific boxes?
here is the chart: https://sandboxie-plus.com/feature-comparison/ You can pay in the store with paypal (should take CC also without an account) or via stripe which takes various payment options in come countries even instant bank transfer.
For some reason, today when I ran Firefox (I am on 141.0.2) after cold starting the computer (W11), Firefox couldn't open up sandboxed. After trying a few times and failing, I updated Sandboxie to 5.71.4 and that fixed the issue. The previous SBIE version was 5.71.2. I am on W11 26100.2899. Last night all was well, I did not update anything between last night and today, perhaps Microsoft changed something silently in my system. Bo
An update to my post above. After updating Sandboxie, I am now experiencing a Copy and Paste issue in Firefox when running sandboxed. This is happening as well as the issue I described above. Both issues are intermittent, sometimes they happen and sometimes they don't. I have already also updated Firefox to version 144.0 and my issues still happen. I can not reproduce either issue running Firefox unsandboxed. I am going to do a clean install of Firefox right now (which I really hate doing) but if anyone else is experiencing issues like what I describe, please tell me, or tell me if your Firefox and SBIE are OK working together at this moment. I appreciate reply's, either way. Perhaps there is a known issue that I don't know about, so I ll wait a little while (for reply's) before clean installing Firefox. Bo
@DavidXanatos Hi David. Please read my posts above. I am having an issue with Firefox running sandboxed. There seems to be 2 issues. 1. You click to run Firefox sandboxed, and it doesn't run. It hangs in the sandbox, it tries to open but doesn't open. And 2. You click to Copy something in a webpage, and when you try to paste it in another webpage or outside sandboxed Firefox, like on a Text file, the Paste option is greyed out (unlike the photo below). To fix the issue. First I updated Sandboxie and Firefox to version 144.0. Afterward, I tested with 2 new default settings sandboxes. And now, I uninstalled Firefox and clean installed Firefox. The issues come and go. Issue 1 (Firefox hangs, I haven't experienced it for a few hours). The one that is easy to reproduce again and again is the copy and paste one. About 50% of the time when I open Firefox, Copy/Paste might be working OK or it might not be working. Do you know anything? Is there an issue that you know of? If there is, and you are not aware of, it should be easy to reproduce. I am in W11 26100.6899. In unsandboxed Firefox, now or before the things that I done, Firefox has no issue. David, I made this video for you, click link below. In the video, I click Copy and try to paste in another webpage, but can't because the option is greyed out. https://gofile.io/d/XQxbAb Bo
Hi Bo, I won't be of much help as I'm on Windows 10, but I have no issues with the latest Sandboxie Classic and the latest Firefox. I watched the video too, interesting problem, but I have no idea why it's happening. If there was no Windows update and it just suddenly started acting up, then I have no clue, but something must have changed. Try running SFC and DISM maybe? Wish I could be of more help.
Hi Bellzemos. There is nothing wrong with Windows or Firefox, the problem is Sandboxie. Probably a corrupted Sandboxie.ini. So, to fix the issue I'll have to clean install SBIE. I just wish David replied, perhaps he knows something, and I could avoid going thru a lot of hoops and could have avoided all the effort I did last night to find a solution to fix my issue. The only other time I reported an issue with his SBIE, he didn't even acknowledge my post. I spend a long time last night testing and discovered a easy workaround to the issue, the workaround also works for Firefox hanging in the sandbox, which it happened just a few minutes ago when I cold started my W11. Regards Bo
I'm not aware of any C&P related issues in the current build. There are some options which with the latest firefox are no longer compatible (not starting) Please check your Sandboxie.Ini if you have EnableWin32kHooks=n anyware if you find it remove it and reboot to take effect. Please check your Sandboxie.Ini if you have OpenWndStation=y remove it. I'll update my test VM right now and try the latest firefoxes again, last time i checked all as fine except for the mentioned configs FYI: on my workstation win 11 non insider FF 145 dev edition works just fine @bo elam if you require my atention please send me a private message, that sends me an email. Also everybody else please don't hesitate to PM me or email me if you need my attention urgently.
David, you can set Watch Forum by clicking on the link then mark cases to receive notifications via email, look: Spoiler
Appreciate the reply, David. @DavidXanatos I checked my Sandboxie.Ini and those old settings are not in there. No one else has reported or confirmed my issue so probably is not a major issue but it was driving me crazy. After 4 days I am getting used to it. The hanging in general only happens after a reboot or cold starting the computer. To solve this, I open Firefox unsandboxed once, close it, and then Firefox will open up sandboxed. And more likely than not, this will not happen again until I either reboot or cold start the computer. That is issue 1. I wrote about my issue 2 (copy and pasting not working while running Firefox sandboxed) in my previous posts, I posted a video earlier about this, if you haven't seen it, I just checked and can confirm the video has not been deleted yet. And there is a third issue that I haven't mentioned. When issue 2 (paste don't work) is in effect, issue 3 also takes place. Look at the pictures below. In the top picture is what we should always see when we click File>Open file in Firefox. In the picture at the bottom you can see what I see when the issue is in effect. So, always, if in a session, I can not paste what I copy, I will also see what you see in the bottom picture (files you want to upload are not visible), they can be uploaded but you only see a name. I done all kind of stuff trying to figure this out, even using restore and clean installing both, Firefox and Sandboxie. The restore was to 4 days before I started experiencing this issue. The good thing is that if when I open Firefox, I am able to see what is displayed in the picture at the top, the entire browsing session will be without issue. So, as a workaround, for issue 2 and 3, I run Firefox sandboxed and immediately click Open file, if all looks well, the rest of the browsing session will be OK. FWIW, I can not reproduce any of the 3 issues in unsandboxed Firefox. I tried a lot of things in Firefox, like, not changing any setting or not using CSS. The only thing I have not tried is not using NoScript. Yesterday I even thought about trying another browser but Firefox is really the only one that is good with NoScript. Edge and probably Chrome make it difficult to use NoScript. So, you should not waste too much time on this if any, other people would have reported something if this was a major issue, it is for me but like I said, I am getting used to it. Anyway, it might go away, just as it came. Bo
This is very strange, are you using any other security software alongside Sandboxie? Usually its not required to reinstall sandboxie, best test is to rename Sandboxie.ini to something like MySandboxie.ini run some tests with a new ini being created and then you can just delete the new one and rename the original back to revert everything. And unless the is an issue with the global config creating a new box is just as good for testing. Could you send me your sandboxie.ini then I could test it in my VM. The tumbnails not being rendered is strange, when you are in such a state and open a second instance of firefox unsandboxed, will it will behave normally? I would suspect there being some windows resource (User or GDI objects) leak, once they are used up the UI gets screwy. The insider/preview version of sandboxie has a function to use a sandbox internal clipboard, why this is not a fix it would be a workaround, may be, if you want I can send you a download link for that.
Hi David. Other security software? No, I don't use nothing but SBIE and NoScript. Test? I tested with at least a couple of new sandboxes with both versions of SBIE and Firefox that I used this past 4 days. Also, the issues happen with the old Ini (that is the one that a few minutes ago I PM you) and the one that was created when I clean installed SBIE. Regarding sandboxes. The issues take place in ANY sandbox so it is probably something global. Regarding this, "The tumbnails not being rendered is strange, when you are in such a state and open a second instance of firefox unsandboxed, will it will behave normally?" I have not open an unsandboxed Firefox when I get the issue of thumbnails not being rendered, but I ll do it next time I experience that issue. But remember, I have not experienced any of the 3 issues I am experiencing when I open Firefox unsandboxed. Luckily I found a decent workaround. For some reason if I start Firefox sandboxed using a sandboxed shortcut created via Windows shell integration instead of forcing the program via Forced programs I experience issues 2 and 3 a lot less. Right now, I can't remember how many times I experienced those issues since I cold started the computer about 9 hours ago. Probably about once or twice. If I was clicking a Firefox shortcut that I have in the taskbar, and running Firefox sandboxed via Forced programs, I ll probably be experiencing those issues about once every 4 times I run Firefox sandboxed. Last night, I planned using the sandboxed shortcut today, unfortunately it didn't help with issue 1. The first time I ran Firefox sandboxed today using the shortcut, Firefox opened fine. But the second time, it hanged. So, I had to terminate that instance of sandboxed Firefox and open Firefox unsandboxred. After doing that, Firefox has not hang at all. If the preview version has a function that can help determine the issue (maybe), send the link to me. Bo
I'm using Windows 10, SBIE + (both currently up-to-date) and unable to open a sandboxed Firefox with the following error message. The procedure entry point PK115SDR_EncryptWithMechanism could not be located with link library C:\ProgramFiles\Mozilla Firefox\xuldll.
no problem. i just installed the update for "classic", started my firefox fully sandbox (no recovery or anything else). but i dont use any password software with extension - means no traffic to localhost this way. try a clean sandbox, does it happen again? some issues are happening because sandbox contains old files from firefox. (as i dont see benefit from sandboxing firefox)
@bo elam today an other user also have reported a clipboard issue: https://github.com/sandboxie-plus/Sandboxie/issues/5060 But did not specify if its general or FF related, so you are not alone but it seams to be rather a rare occurrence.
Hi @DavidXanatos I haven't PM you or post in this thread this past few days because my issues appear to have gone away on its own. Is funny but I kind of felt that that was happening. In an earlier post, I wrote: I have not experienced the copy or thumbnails not rendering issues in about 6 days and sanboxed Firefox has not hanged for about 3 days. I read the github thread you linked. A lot of what that guy says sounds very much like what I have experienced. I think you should ask him if when he is in a browsing session in which copy pasting don't work, does he also experience the thumbnails not rendering properly (remember, I posted a picture of this issue). If he experiences both issues in the same browsing session, then I think he is experiencing same issue that I am or was. As of yet, I don't feel a 100% sure my issues are gone for good but seems like they are. I am using same Firefox and SBIE versions I was using when I started experiencing the issues. Also, I am using the same sandboxes with basically same settings I had when I started experiencing the issues. The only thing that I am doing differently is that instead of forcing Firefox to run it sandboxed, I am clicking a sandboxed shortcut that runs in my default sandbox. I know doing that was not a breakthrough fix because even after I started using the shortcut, I still experienced the issues. Also, using the shortcut I feel it might have helped with sandboxed Firefox hanging after cold starting the computer but not really with the other 2 issues. So, in the end, after all the clean installs and things that I did trying to fix the issues, I ended up exactly where I started, with the issues (apparently) going away on their own. FWIW, 2 days ago I updated W11 to 25H2, doing that has not have any effect for better or worse with regard of my issues. Bo
