Hello. I would like to Install a certificate programmatically on Firefox version 59. I read that i need CertUtil, but the certutil code that i got on github is built from old NSS. so it only generates cert8.db and not Cert9.db, which Firefox 59 needs i assume. So if i am correct, i need to build NSS 3.35 or higher to have a Certutil right? i went to this site to set the Windows Prerequisite and downloaded the mozilla build. and was able to build it. but it was very long so i cancelled it. I have also installed Visual Studio 2017 community Edition with the C++ compilers. https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Build_Instructions/Windows_Prerequisites https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/Building So i have a working mozilla-build folder and working bash prompt . And i have cloned the nspr and nss into my local folder. So when i execute the command to build the nss, i get this error. that C compiler not working. And when i check the console.log, this is what i got. configure:2383: checking build system type configure:2397: result: i686-pc-mingw32 configure:2417: checking host system type configure:2430: result: i686-pc-mingw32 configure:2450: checking target system type configure:2463: result: i686-pc-mingw32 configure:2543: checking for cl configure:2570: result: cl configure:3054: checking for whoami configure:3072: found /c/WINDOWS/System32/whoami configure:3085: result: /c/WINDOWS/System32/whoami configure:3481: checking for C compiler version configure:3490: cl --version >&5 ../configure: line 3492: cl: command not found configure:3501: $? = 127 configure:3490: cl -v >&5 ../configure: line 3492: cl: command not found configure:3501: $? = 127 configure:3490: cl -V >&5 ../configure: line 3492: cl: command not found configure:3501: $? = 127 configure:3490: cl -qversion >&5 ../configure: line 3492: cl: command not found configure:3501: $? = 127 configure:3521: checking whether the C compiler works configure:3543: cl conftest.c >&5 ../configure: line 3545: cl: command not found configure:3547: $? = 127 configure:3585: result: no configure: failed program was: | /* confdefs.h */ | #define PACKAGE_NAME "" | #define PACKAGE_TARNAME "" | #define PACKAGE_VERSION "" | #define PACKAGE_STRING "" | #define PACKAGE_BUGREPORT "" | #define PACKAGE_URL "" | #define DEBUG 1 | /* end confdefs.h. */ | | int | main () | { | | ; | return 0; | } configure:3590: error: in `/c/mynssbuild/nspr/WIN954.0_DBG.OBJ': configure:3592: error: C compiler cannot create executables See `config.log' for more details I do not understand why its not able to run the cl compiler. Cause when i ran the developer command prompt for VS 2017, i can execute cl. I don't know what is causing this error. Is it because bash cannot identify the c Compiler cl? do i have to set additional environment variables? I hope someone can help me to solve this problem. Or if someone has a precompiled NSS 3.35 with Certutil.exe, that would greatly help. Thank you very much, Rommel