Perhaps I should have titled this posting as "Disabling Browser Guard Fixes Blocked Logins".
I can't login to HomeDepot.com. Testing shows that Home Depot's website isn't down. I can access HomeDepot website pages via my history, but I can't login via its signin page. I called HomeDepot.com at 1800-466-3337. I kept selecting the online options (even when they didn't apply). I eventually got transferred to sofware support. The rep was quite competent. She pointed out that a google search on my failure -- that my login page gets stuck with the following msg showing in the bottom left corner of the screen: performing TLS handshake with gstatic.com -- suggested that the problem lay with FireFox, not Home Depot. I verified her claim by performing the same google search. I cleared FireFox's cookies. No joy. I quit out of, and then re-entered, FireFox. No joy.
Nextly, the rep wanted me to re-create my FireFox profile from scratch. Ugh. Alternatively, she said that I could try creating a new HomeDepot account with a different email address. I tried to do that. I eventually got to the point where I was supposed to pass a captcha before creating my new account, but the webpage displayed no captchas for me to pass. Instant checkmate. This stink is redolent of my recent login problems with Torrentday.com. Yep. Testing shows that I can't login to Tday either. I verified that both HomeDepot and Tday were listed in Browser Guard's allowed list. I restarted FireFox and tried again. Same result.
I reset my PC. No joy. I disabled Browser Guard. I restarted FireFox. No joy. I reset the PC. Joy! Once again, I can login to both Home Depot and Tday. I re-enabled Browser Guard and restarted FireFox. I can still login to both websites.
FireFox 88.0 64-bit
Automatic updates are disabled
Browser Guard 2.3.11
Last updated Oct 31, 2021
Allow automatic updates .... Default
There is something funky going on here in that login-blockage events do not coincide with software updates. The first login blockages occurred on 10/6/2021, while running BG 2.3.10. I had installed FireFox 91.1.0esr about 7 days before. I recovered by reverting to a system backup that I'd made 2 months earlier. I was now running FireFox 88.0 -- a version that ran well with my system. Since I disable automatic updates, FireFox 88.0 remained active going forward. The login blockage recurred on 10/30/2021, while running BG 2.3.10. I recovered by disabling Browser Guard and resetting the PC. I updated Browser Guard to v2.3.11. The login blockage recurred again on 11/15/2021. I recovered by disabling Browser Guard and resetting the PC.