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DNA Industrial Hygiene

The professionals resource

Supported Web Browsers & How to Clear Your Cache



For the best experience on our website, we recommend using a modern, up‑to‑date web browser. Current browsers offer improved security, faster performance, and better compatibility with online forms and tools.

Recommended Web Browsers

Our site works best with the following:

✔DuckDuckGo
Privacy‑focused web browser

✔ Mozilla Firefox
Reliable, privacy‑focused, and compatible with all site features.

✔ Google Chrome
Widely used and regularly updated. Sometimes may challenge for credentials after credentials have been accepted. Simply close the credential challenge and continue to fill in the forms.

✔ Apple Safari
Optimized for macOS and iOS devices.

Avoid using:
❌ Microsoft Edge may not display or operate our order desk correctly.
For the best experience, we recommend using an alternative browser such as Firefox, Chrome, Safari, or DuckDuckGo.


Using an older browser may cause pages to load incorrectly or prevent forms from submitting properly. If you experience issues, updating your browser or clearing your cache usually resolves them.

How to Clear Your Browser Cache



Clearing your cache can fix loading problems, display issues, or outdated content. Below are quick instructions for the two most commonly used browsers.

Microsoft Edge – Clear Cache

1. Open Microsoft Edge
2. Click the
three dots (⋯) in the upper‑right corner
3. Select
Settings
4. Choose
Privacy, search, and services
5. Under
Clear browsing data, click Choose what to clear
6. Select
Cached images and files
7. Click
Clear now

This refreshes stored website data and often resolves display or form issues.

---

Mozilla Firefox – Clear Cache

1. Open
Firefox
2. Click the
menu button (☰) in the upper‑right corner
3. Select
Settings
4. Go to
Privacy & Security
5. Scroll to
Cookies and Site Data
6. Click
Clear Data…
7. Check
Cached Web Content
8. Click
Clear

Firefox will remove old cached files and load the newest version of each page.

Troubleshooting Guide



If you’re having trouble viewing pages, submitting forms, or loading content on our website, the steps below usually resolve the issue quickly.

1. Refresh the Page
Sometimes the browser loads an outdated version of the page.

Windows (Edge, Firefox, Chrome):
F5 or Ctrl + R
Ctrl + Shift + R for a hard refresh

Mac (Edge, Firefox, Chrome, Safari):
Command + R
Command + Shift + R for a hard refresh

2. Clear Your Browser Cache
Old cached files can cause pages to load incorrectly or prevent forms from submitting.

You can follow our step‑by‑step instructions for:
• Microsoft Edge
• Mozilla Firefox

Clearing your cache often fixes display issues, missing buttons, or forms that won’t submit.

3. Try a Different Browser
If refreshing and clearing cache doesn’t help, try opening the site in another supported browser:

• DuckDuckGo Browser
• Mozilla Firefox
• Apple Safari
• Google Chrome



If the site works in another browser, your original browser may need an update.

4. Make Sure Your Browser Is Up to Date
Older browsers may not support modern website features.
Check for updates in your browser’s Settings or About menu.

5. Disable Browser Extensions Temporarily
Some extensions, such as ad blockers or script blockers, can interfere with forms or page scripts.

Try disabling extensions temporarily, then reload the page.

6. Check Your Internet Connection
Slow or unstable connections can cause pages to load partially or time out.

Try reloading the page, switching networks, or restarting your router.

7. Try Using a Private or Incognito Window
Private browsing disables most cached files and extensions.

If the site works in private mode, the issue is likely related to cached data, a browser extension, or a stored cookie.

8. Restart Your Browser
Fully close the browser (all windows and tabs), then reopen it.
This clears temporary glitches and resets the session.

Still Having Trouble?
If you continue to experience issues, please contact us.
Let us know which browser you’re using, whether the issue happens on multiple devices, and any error messages you see.


Why Clients Choose DNA

CIH‑Led Expertise - All major projects are overseen by Certified Industrial Hygienists with decades of field experience.
Clear, Defensible Reporting - Our documentation is structured for regulatory review, legal defense, and practical decision‑making.
Responsive Field Support - We mobilize quickly for urgent needs, including IAQ complaints, water intrusion, asbestos/lead disturbances, and environmental releases.
Comprehensive Capabilities - Industrial hygiene, environmental assessment, remediation oversight, and training — all under one roof.

Trusted Since 1982 - A long‑standing reputation for accuracy, professionalism, and client‑focused service.


Industries We Serve

Schools & Universities | Healthcare & Medical Facilities | Industrial & Manufacturing | Construction & Engineering | Real Estate & Property Management | Municipal & Government Agencies | Utilities & Infrastructure | Legal & Insurance Professionals

DNA Industrial Hygiene © 2026
License Number 773462
Classifications A Haz