84,488,480 programs installed

Should I remove 1stBrowser?

What percent of users and experts removed it?
3% remove it97% keep it
Overall Sentiment
What do people think about it?
Be the first to rate (click star to rate)
How common is it?
Global Rank #30,154
United States Rank #38,409
Reach 0.0048%
Lifespan of installation (until removal)
< 6.01 days
177.40 days >
Average installed length: 93.21 days


45.0.2454.172 1.06%
45.0.2454.171 9.57%
45.0.2454.167 36.17%
45.0.2454.166 1.06%
45.0.2454.165 1.06%
45.0.2454.161 3.19%
45.0.2454.160 1.06%
45.0.2454.157 5.32%
45.0.2454.152 6.38%
45.0.2454.146 10.64%
45.0.2454.127 4.26%
45.0.2454.126 1.06%
45.0.2454.119 6.38%
45.0.2454.109 3.19%
42.0.2311.130 4.26%
42.0.2311.123 3.19%
42.0.2311.118 1.06%
42.0.2311.107 1.06%

Other programs by Sien



1stBrowser is a software program developed by Sien. The most common release is 45.0.2454.167, with over 98% of all installations currently using this version. It adds registry entry for the current user which will allow the program to automatically start each time it is rebooted. A scheduled task is added to Windows Task Scheduler in order to launch the program at various scheduled times (the schedule varies depending on the version). The software is designed to connect to the Internet and adds a Windows Firewall exception in order to do so without being interfered with. The primary executable is named 1stbrowser.exe. The setup package generally installs about 8 files and is usually about 295.61 MB (309,970,627 bytes). Relative to the overall usage of users who have this installed on their PCs, most are running Windows 10 and Windows 7 (SP1). While about 27% of users of 1stBrowser come from the United States, it is also popular in Italy and Brazil.

Program detailsProgram details

Installation folder: C:\users\user\appdata\Local\1stBrowser\Application
Uninstaller: "C:\users\user\appdata\Local\1stBrowser\Application\45.0.2454.109\Installer\setup.exe" --uninstall
Estimated size: 295.61 MB

Program filesFiles installed by 1stBrowser

Program executable:1stbrowser.exe
Additional files:
  • chrome_elf.dll (by The 1stBrowser Authors) - 1stBrowser
  • old_chrome.exe (by The 1stBrowser Authors)
  • LibUtils.dll (by CompanyName) - LibUtils
  • crash_service.exe
  • extension_list.json

Program behaviorsBehaviors exhibited

3 Scheduled Tasks
  • crash_service.exe is scheduled as a task named 'crash_service' (runs on registration).
  • 1stbrowser.exe is scheduled as a task named '1stbrowser' (runs on registration).
  • old_chrome.exe is scheduled as a task named '1stbrowser' (runs on registration).
3 Startup Files (User Run)
  • crash_service.exe is loaded in the current user (HKCU) registry as an auto-starting executable named 'CrashService' and executes as "C:\users\user\appdata\Local\1stBrowser\Application\crash_service.exe" --max-reports=50 --no-window.
  • 1stbrowser.exe is loaded in the current user (HKCU) registry as an auto-starting executable named '1stbrowser' and executes as "C:\users\user\appdata\Local\1stBrowser\Application\1stbrowser.exe" --location=0.
  • old_chrome.exe is loaded in the current user (HKCU) registry as an auto-starting executable named '1stbrowser' and executes as "C:\users\user\appdata\Local\1stBrowser\Application\1stbrowser.exe" --location=0.
Windows Firewall Allowed Program
  • 1stbrowser.exe is added as a firewall exception for 'C:\Documents and Settings\user\Application\1stbrowser.exe'.

How do I remove 1stBrowser?

You can uninstall 1stBrowser from your computer by using the Add/Remove Program feature in the Window's Control Panel.
  1. On the Start menu (for Windows 8, right-click the screen's bottom-left corner), click Control Panel, and then, under Programs, do one of the following:
    • Windows Vista/7/8/10: Click Uninstall a Program.
    • Windows XP: Click Add or Remove Programs.
  2. When you find the program 1stBrowser, click it, and then do one of the following:
    • Windows Vista/7/8/10: Click Uninstall.
    • Windows XP: Click the Remove or Change/Remove tab (to the right of the program).
  3. Follow the prompts. A progress bar shows you how long it will take to remove 1stBrowser.

Win 10 55%
Win Vista (SP2) 2%
Auto-starting? Yes
(Found in the run registry)
Uninstall it 3%
Keep it 97%

Windows OS versionsWindows

Which Windows OS versions does it run on?
Windows 10 55.32%
Windows 7 38.30%
Windows XP 4.26%
Windows Vista 2.13%
Which OS releases does it run on?
Windows 10 Home 18.28%
Windows 7 Ultimate 17.20%
Windows 10 Pro 11.83%
Windows 7 Home Premium 11.83%
Windows 7 Professional 6.45%
Windows 8.1 Pro 5.38%

Distribution by countryGeography

27.00% of installs come from the United States
Which countries install it?
  United States 27.00%
  Italy 14.00%
  Brazil 9.00%
  Germany 7.00%
  France 6.00%
  Spain 6.00%
  Mexico 4.00%
  Colombia 3.00%
  DZ 3.00%
  United Kingdom 3.00%
  Ecuador 2.00%
  India 2.00%
  Pakistan 2.00%
  IQ 2.00%

OEM distributionPC manufacturers

What PC manufacturers (OEMs) have it installed?
Acer 34.85%
Hewlett-Packard 31.82%
Lenovo 10.61%
Dell 9.09%
ASUS 9.09%
Toshiba 3.03%
Medion 1.52%
Common models
HP Pavilion g6 Notebook P... 3.57%
HP 2000 Notebook PC 2.38%
PositivoEINM10CB 2.38%
LENOVO 80SB 2.38%
LENOVO 20080 2.38%
Packard Bell EasyNote TJ6... 2.38%


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