Most modern web browsers have "Web Storage" capabilities enabled by default, however, if you (or your IT administrator) have disabled such features, or you'd like to clear the existing "Web Storage" data cache currently stored in your browser by Unmind, then find your Browser below and follow the steps...

To clear Web Storage in Internet Explorer:

Select Tools → Internet Options → General → check "Delete browsing history on exit", click on Delete, check "Cookies", click on Delete once more and then restart your browser for changes to fully take affect. Note: This will remove cookies in addition to Web Storage data, as the browser currently doesn't provide a friendly way to clear Web Storage data without also affecting cookies.

To enable/disable Web Storage in Internet Explorer:

Select Extras → Internet Options → Advanced Tab → Go to Security → uncheck "Enable DOM-Storage"

To clear Web Storage in Edge:

Select Settings → Clear browsing data → Choose what to clear → Cookies and saved website data. Note: This will remove cookies in addition to Web Storage data, as the browser currently doesn't provide a friendly way to clear Web Storage data without also affecting cookies.

To enable/disable Web Storage in Edge:

Select Settings → Advanced Settings → Cookies → Block all cookies. Note: This will affect both Web Storage and cookies.

To clear Web Storage in Firefox:

Select Tools → Clear Recent History, open Details, check "Cookies" and select "Everything" as time range.
Note: This will remove cookies in addition to Web Storage data, as the browser currently doesn't provide a friendly way to clear Web Storage data without also affecting cookies. Also note that no other time range other than "Everything" will clear Web Storage.

To enable/disable Web Storage in Firefox:

Type about:config in the address bar to view advanced settings. Scroll down to (or search for) dom.storage.enabled, right click on the entry where you can toggle its enabled/disabled state.

To clear Web Storage in Chrome:

Select Tools → Clear browsing data... check "Delete cookies and other site data", select "Everything" from "Clear data from this period" and click the "Clear browsing data" button. Note: This will remove cookies in addition to Web Storage data, as the browser currently doesn't provide a friendly way to clear Web Storage data without also affecting cookies.

To enable/disable Web Storage in Chrome:

Open Options and select the "Under the Hood" tab. Click on "Content settings", select "Cookies" and set "Block sites from setting any data". Note: This will affect both Web Storage and cookies.

To clear Web Storage in Safari:

Select Preferences → Privacy → Manage Website Data... → Remove All. Note: This will remove cookies in addition to Web Storage data, as the browser currently doesn't provide a friendly way to clear Web Storage data without also affecting cookies.

To enable/disable Web Storage in Safari:

Select Preferences → Privacy → Cookies and website data → Always block. Note: This will affect both Web Storage and cookies.

To clear Web Storage in Opera:

Select Settings → Privacy and security → Clear browsing data... check "Cookies and other site data", select "the beginning of time" from the drop-down and click the "Clear browsing data" button. Note: This will remove cookies in addition to Web Storage data, as the browser currently doesn't provide a friendly way to clear Web Storage data without also affecting cookies.

To enable/disable Web Storage in Opera:

Select Settings → Privacy and security → Cookies and set "Block sites from setting any data". Note: This will affect both Web Storage and cookies.

Ref: https://mid.as/kb/article/00103 

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