networking - Firefox cannot load page in 16.04 - Ask Ubuntu

my system running ubuntu 16.04 lts , have been facing weird problem ever since started using it. many times, when try open website on browser (firefox), i'm told "server not found" , after refreshing page numerous times can webpage. problem not occur or every website simultaneously, happen enough annoy hell out of me.

can shed light on this?

ps. issue seems unique 16.04. use lan connection , nobody else using connection has problem (none of them running 16.04 though). also, had 12.04 before on same system , worked fine.

edit

tracepath google.com   1?: [localhost]                                         pmtu 1500  1:  192.168.0.1                                           0.647ms   1:  192.168.0.1                                           0.706ms   2:  10.119.246.117                                        1.054ms   3:  10.161.18.177                                         9.200ms asymm  7   4:  10.255.235.197                                        8.859ms asymm  7   5:  10.119.73.122                                         9.298ms   6:  no reply  7:  no reply  8:  no reply  9:  no reply 10:  no reply 11:  no reply 12:  no reply 13:  no reply 14:  no reply 15:  no reply 16:  no reply 17:  no reply 

and on.

ping -c 20ping -c 20 google.com ping google.com (216.58.220.206) 56(84) bytes of data. 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=1 ttl=56 time=45.3 ms 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=2 ttl=56 time=45.4 ms 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=3 ttl=56 time=46.1 ms 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=4 ttl=56 time=45.3 ms 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=5 ttl=56 time=45.3 ms 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=6 ttl=56 time=45.3 ms 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=7 ttl=56 time=45.4 ms 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=8 ttl=56 time=45.5 ms 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=9 ttl=56 time=45.3 ms 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=10 ttl=56 time=45.6 ms 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=11 ttl=56 time=45.3 ms 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=12 ttl=56 time=45.6 ms 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=13 ttl=56 time=45.7 ms 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=14 ttl=56 time=45.5 ms 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=15 ttl=56 time=45.3 ms 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=16 ttl=56 time=45.3 ms 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=17 ttl=56 time=45.3 ms 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=18 ttl=56 time=45.3 ms 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=19 ttl=56 time=45.2 ms 64 bytes del01s08-in-f14.1e100.net (216.58.220.206): icmp_seq=20 ttl=56 time=45.3 ms  --- google.com ping statistics --- 20 packets transmitted, 20 received, 0% packet loss, time 19027ms rtt min/avg/max/mdev = 45.289/45.459/46.109/0.307 ms 

also this

 cat /etc/nsswitch.conf # /etc/nsswitch.conf # # example configuration of gnu name service switch functionality. # if have `glibc-doc-reference' , `info' packages installed, try: # `info libc "name service switch"' information file.  passwd:         compat group:          compat shadow:         compat gshadow:        files  hosts:          files mdns4_minimal [notfound=return] dns networks:       files  protocols:      db files services:       db files ethers:         db files rpc:            db files  netgroup:       nis 

and this

computer                       description: desktop computer     product: p6-2356in (h3w39aa#acj)     vendor: hewlett-packard     serial: [removed]     width: 64 bits     capabilities: smbios-2.7 dmi-2.7 vsyscall32     configuration: boot=normal chassis=desktop family=103c_53316j g=d sku=h3w39aa#acj uuid=[removed]   *-core        description: motherboard        product: 2abf        vendor: foxconn        physical id: 0        version: 3.10      *-firmware           description: bios           vendor: ami           physical id: 0           version: 8.12           date: 12/14/2012           size: 64kib           capacity: 8128kib           capabilities: pci pnp upgrade shadowing cdboot bootselect edd int5printscreen int9keyboard int14serial int17printer acpi usb biosbootspecification netboot uefi      *-cache:0           description: l2 cache           physical id: 23           slot: cpu internal l2           size: 1mib           capacity: 1mib           capabilities: internal write-through unified           configuration: level=2      *-cache:1           description: l1 cache           physical id: 24           slot: cpu internal l1           size: 256kib           capacity: 256kib           capabilities: internal write-through data           configuration: level=1      *-cache:2           description: l3 cache           physical id: 25           slot: cpu internal l3           size: 6mib           capacity: 6mib           capabilities: internal write-back unified           configuration: level=3      *-cpu           description: cpu           product: intel(r) core(tm) i5-3330 cpu @ 3.00ghz           vendor: intel corp.           physical id: 27           bus info: cpu@0           version: intel(r) core(tm) i5-3330 cpu @ 3.00ghz           slot: socket 0           size: 1707mhz           capacity: 3800mhz           width: 64 bits           clock: 100mhz           capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm epb tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms xsaveopt dtherm ida arat pln pts cpufreq           configuration: cores=4 enabledcores=4 threads=4      *-memory           description: system memory           physical id: 28           slot: system board or motherboard           size: 4gib         *-bank:0              description: dimm [empty]              product: [empty]              vendor: [empty]              physical id: 0              serial: [removed]              slot: dimm1         *-bank:1              description: dimm ddr3 synchronous 1600 mhz (0.6 ns)              product: rmr5040ed58e9w1600              vendor: ramaxel              physical id: 1              serial: [removed]              slot: dimm3              size: 4gib              width: 64 bits              clock: 1600mhz (0.6ns)      *-pci           description: host bridge           product: xeon e3-1200 v2/3rd gen core processor dram controller           vendor: intel corporation           physical id: 100           bus info: pci@0000:00:00.0           version: 09           width: 32 bits           clock: 33mhz           configuration: driver=ivb_uncore           resources: irq:0         *-pci:0              description: pci bridge              product: xeon e3-1200 v2/3rd gen core processor pci express root port              vendor: intel corporation              physical id: 1              bus info: pci@0000:00:01.0              version: 09              width: 32 bits              clock: 33mhz              capabilities: pci pm msi pciexpress normal_decode bus_master cap_list              configuration: driver=pcieport              resources: irq:25 ioport:e000(size=4096) memory:f6000000-f70fffff ioport:e8000000(size=167772160)            *-display                 description: vga compatible controller                 product: gf119 [geforce gt 620 oem]                 vendor: nvidia corporation                 physical id: 0                 bus info: pci@0000:01:00.0                 version: a1                 width: 64 bits                 clock: 33mhz                 capabilities: pm msi pciexpress vga_controller bus_master cap_list rom                 configuration: driver=nouveau latency=0                 resources: irq:28 memory:f6000000-f6ffffff memory:e8000000-efffffff memory:f0000000-f1ffffff ioport:e000(size=128) memory:f7000000-f707ffff            *-multimedia                 description: audio device                 product: gf119 hdmi audio controller                 vendor: nvidia corporation                 physical id: 0.1                 bus info: pci@0000:01:00.1                 version: a1                 width: 32 bits                 clock: 33mhz                 capabilities: pm msi pciexpress bus_master cap_list                 configuration: driver=snd_hda_intel latency=0                 resources: irq:17 memory:f7080000-f7083fff         *-communication              description: communication controller              product: 6 series/c200 series chipset family mei controller #1              vendor: intel corporation              physical id: 16              bus info: pci@0000:00:16.0              version: 04              width: 64 bits              clock: 33mhz              capabilities: pm msi bus_master cap_list              configuration: driver=mei_me latency=0              resources: irq:29 memory:f730a000-f730a00f         *-usb:0              description: usb controller              product: 6 series/c200 series chipset family usb enhanced host controller #2              vendor: intel corporation              physical id: 1a              bus info: pci@0000:00:1a.0              version: 05              width: 32 bits              clock: 33mhz              capabilities: pm debug ehci bus_master cap_list              configuration: driver=ehci-pci latency=0              resources: irq:16 memory:f7308000-f73083ff            *-usbhost                 product: ehci host controller                 vendor: linux 4.4.0-47-generic ehci_hcd                 physical id: 1                 bus info: usb@1                 logical name: usb1                 version: 4.04                 capabilities: usb-2.00                 configuration: driver=hub slots=2 speed=480mbit/s               *-usb                    description: usb hub                    product: integrated rate matching hub                    vendor: intel corp.                    physical id: 1                    bus info: usb@1:1                    version: 0.00                    capabilities: usb-2.00                    configuration: driver=hub slots=4 speed=480mbit/s                  *-usb                       description: keyboard                       product: usb receiver                       vendor: logitech                       physical id: 1                       bus info: usb@1:1.1                       version: 29.00                       capabilities: usb-2.00                       configuration: driver=usbhid maxpower=98ma speed=12mbit/s         *-multimedia              description: audio device              product: 6 series/c200 series chipset family high definition audio controller              vendor: intel corporation              physical id: 1b              bus info: pci@0000:00:1b.0              version: 05              width: 64 bits              clock: 33mhz              capabilities: pm msi pciexpress bus_master cap_list              configuration: driver=snd_hda_intel latency=0              resources: irq:30 memory:f7300000-f7303fff         *-pci:1              description: pci bridge              product: 6 series/c200 series chipset family pci express root port 1              vendor: intel corporation              physical id: 1c              bus info: pci@0000:00:1c.0              version: b5              width: 32 bits              clock: 33mhz              capabilities: pci pciexpress msi pm normal_decode bus_master cap_list              configuration: driver=pcieport              resources: irq:16         *-pci:2              description: pci bridge              product: 6 series/c200 series chipset family pci express root port 2              vendor: intel corporation              physical id: 1c.1              bus info: pci@0000:00:1c.1              version: b5              width: 32 bits              clock: 33mhz              capabilities: pci pciexpress msi pm normal_decode bus_master cap_list              configuration: driver=pcieport              resources: irq:17 memory:f7200000-f72fffff            *-network disabled                 description: wireless interface                 product: rt5390r 802.11bgn pcie wireless network adapter                 vendor: ralink corp.                 physical id: 0                 bus info: pci@0000:03:00.0                 logical name: wlp3s0                 version: 00                 serial: [removed]                 width: 32 bits                 clock: 33mhz                 capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless                 configuration: broadcast=yes driver=rt2800pci driverversion=4.4.0-47-generic firmware=n/a latency=0 link=no multicast=yes wireless=ieee 802.11bgn                 resources: irq:17 memory:f7200000-f720ffff         *-pci:3              description: pci bridge              product: 6 series/c200 series chipset family pci express root port 6              vendor: intel corporation              physical id: 1c.5              bus info: pci@0000:00:1c.5              version: b5              width: 32 bits              clock: 33mhz              capabilities: pci pciexpress msi pm normal_decode bus_master cap_list              configuration: driver=pcieport              resources: irq:17 ioport:d000(size=4096) memory:f7100000-f71fffff            *-network                 description: ethernet interface                 product: rtl8111/8168/8411 pci express gigabit ethernet controller                 vendor: realtek semiconductor co., ltd.                 physical id: 0                 bus info: pci@0000:04:00.0                 logical name: enp4s0                 version: 06                 serial: [removed]                 size: 100mbit/s                 capacity: 1gbit/s                 width: 64 bits                 clock: 33mhz                 capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation                 configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3lk-napi duplex=full firmware=rtl_nic/rtl8168e-2.fw ip=[removed] latency=0 link=yes multicast=yes port=mii speed=100mbit/s                 resources: irq:26 ioport:d000(size=256) memory:f7104000-f7104fff memory:f7100000-f7103fff         *-usb:1              description: usb controller              product: 6 series/c200 series chipset family usb enhanced host controller #1              vendor: intel corporation              physical id: 1d              bus info: pci@0000:00:1d.0              version: 05              width: 32 bits              clock: 33mhz              capabilities: pm debug ehci bus_master cap_list              configuration: driver=ehci-pci latency=0              resources: irq:23 memory:f7307000-f73073ff            *-usbhost                 product: ehci host controller                 vendor: linux 4.4.0-47-generic ehci_hcd                 physical id: 1                 bus info: usb@2                 logical name: usb2                 version: 4.04                 capabilities: usb-2.00                 configuration: driver=hub slots=2 speed=480mbit/s               *-usb                    description: usb hub                    product: integrated rate matching hub                    vendor: intel corp.                    physical id: 1                    bus info: usb@2:1                    version: 0.00                    capabilities: usb-2.00                    configuration: driver=hub slots=6 speed=480mbit/s                  *-usb:0                       description: generic usb device                       product: slp                       vendor: samsung                       physical id: 4                       bus info: usb@2:1.4                       version: 4.00                       serial: [removed]                       capabilities: usb-2.00                       configuration: driver=usbfs maxpower=48ma speed=480mbit/s                  *-usb:1                       description: mass storage device                       product: mass storage device                       vendor: generic                       physical id: 6                       bus info: usb@2:1.6                       logical name: scsi5                       version: 1.00                       serial: [removed]                       capabilities: usb-2.00 scsi emulated scsi-host                       configuration: driver=usb-storage maxpower=100ma speed=480mbit/s                     *-disk                          description: scsi disk                          physical id: 0.0.0                          bus info: scsi@5:0.0.0                          logical name: /dev/sdb                          configuration: logicalsectorsize=512 sectorsize=512         *-isa              description: isa bridge              product: h61 express chipset family lpc controller              vendor: intel corporation              physical id: 1f              bus info: pci@0000:00:1f.0              version: 05              width: 32 bits              clock: 33mhz              capabilities: isa bus_master cap_list              configuration: driver=lpc_ich latency=0              resources: irq:0         *-storage              description: sata controller              product: 6 series/c200 series chipset family sata ahci controller              vendor: intel corporation              physical id: 1f.2              bus info: pci@0000:00:1f.2              version: 05              width: 32 bits              clock: 66mhz              capabilities: storage msi pm ahci_1.0 bus_master cap_list              configuration: driver=ahci latency=0              resources: irq:27 ioport:f070(size=8) ioport:f060(size=4) ioport:f050(size=8) ioport:f040(size=4) ioport:f020(size=32) memory:f7306000-f73067ff         *-serial unclaimed              description: smbus              product: 6 series/c200 series chipset family smbus controller              vendor: intel corporation              physical id: 1f.3              bus info: pci@0000:00:1f.3              version: 05              width: 64 bits              clock: 33mhz              configuration: latency=0              resources: memory:f7305000-f73050ff ioport:f000(size=32)      *-scsi:0           physical id: 1           logical name: scsi1           capabilities: emulated         *-disk              description: ata disk              product: st3500414cs              vendor: seagate              physical id: 0.0.0              bus info: scsi@1:0.0.0              logical name: /dev/sda              version: ca14              serial: [removed]              size: 465gib (500gb)              capabilities: gpt-1.00 partitioned partitioned:gpt              configuration: ansiversion=5 guid=f83e4e9e-ebeb-4ea7-b272-14a761ba61bd logicalsectorsize=512 sectorsize=512            *-volume:0 unclaimed                 description: windows fat volume                 vendor: mkfs.fat                 physical id: 1                 bus info: scsi@1:0.0.0,1                 version: fat32                 serial: [removed]                 size: 510mib                 capacity: 511mib                 capabilities: boot fat initialized                 configuration: fats=2 filesystem=fat name=efi system partition            *-volume:1                 description: ext4 volume                 vendor: linux                 physical id: 2                 bus info: scsi@1:0.0.0,2                 logical name: /dev/sda2                 logical name: /                 version: 1.0                 serial: [removed]                 size: 461gib                 capabilities: journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized                 configuration: created=2016-09-08 18:49:43 filesystem=ext4 lastmountpoint=/ modified=2016-11-19 08:19:23 mount.fstype=ext4 mount.options=rw,relatime,errors=remount-ro,data=ordered mounted=2016-11-19 08:19:29 state=mounted            *-volume:2                 description: linux swap volume                 vendor: linux                 physical id: 3                 bus info: scsi@1:0.0.0,3                 logical name: /dev/sda3                 version: 1                 serial: [removed]                 size: 4052mib                 capacity: 4052mib                 capabilities: nofs swap initialized                 configuration: filesystem=swap pagesize=4095      *-scsi:1           physical id: 2           logical name: scsi4           capabilities: emulated         *-cdrom              description: dvd-ram writer              product: dvd  dh16acshr              vendor: hp              physical id: 0.0.0              bus info: scsi@4:0.0.0              logical name: /dev/cdrom              logical name: /dev/cdrw              logical name: /dev/dvd              logical name: /dev/dvdrw              logical name: /dev/sr0              version: jhg6              capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram              configuration: ansiversion=5 status=nodisc   *-power unclaimed        product: standard efficiency        physical id: 1        capacity: 32768mwh 

check first network manager. whether ipv6 enable or not doesn't give attention when when ipv4 in static you'll problem. make sure ipv4 on obtain mode dynamic ip address. windows disable , enable few seconds,to refresh.then open again browser.