FireFox Continues to Expand the East Zone with High-Grade Drill Results, including 13.75 g/t Gold over 12.4 Metres in Another Step-out Hole at the Mustajärvi Gold Project, Finland

Rhea-AI Summary

FireFox (OTCQB:FFOXF) reported drill results from four holes (25MJ005–25MJ008) at the Mustajärvi gold project, Finland, highlighting 12.4 m @ 13.75 g/t Au from 37.9 m, 3.75 m @ 19.65 g/t Au from 99.85 m and 5.7 m @ 17.71 g/t Au from 217.0 m in hole 25MJ005. The results extend high-grade East Zone mineralization up to a 45 m step-out and confirm a conductive geophysical target. The program is part of up to 10,000 m planned drilling through spring 2026; the first round completed 3,985.3 m and assays are pending for seven holes.

Positive

• 12.4 m @ 13.75 g/t Au in hole 25MJ005
• 3.75 m @ 19.65 g/t Au including 0.8 m @ 53.3 g/t
• 5.7 m @ 17.71 g/t Au from 217.0 m (deep fault-breccia)
• 10,000 m drill program planned through spring 2026
• First round completed: 3,985.3 m (15 holes)

Negative

• One high-grade interval includes 1.4 m core loss assigned 0.0 g/t
• Final assays pending for 7 holes from phase one
• True widths not yet estimated for reported intercepts

News Market Reaction

+1.87%

1 alert

+1.87% News Effect

On the day this news was published, FFOXF gained 1.87%, reflecting a mild positive market reaction.

Data tracked by StockTitan Argus on the day of publication.

Key Figures

Gold grade & width: 13.75 g/t Au over 12.4 m High-grade interval: 19.65 g/t Au over 3.75 m Deeper interval: 17.71 g/t Au over 5.7 m +5 more

8 metrics

Gold grade & width 13.75 g/t Au over 12.4 m Drill hole 25MJ005 from 37.9 m downhole

High-grade interval 19.65 g/t Au over 3.75 m Drill hole 25MJ005 from 99.85 m

Deeper interval 17.71 g/t Au over 5.7 m Drill hole 25MJ005 from 217.0 m

Program size up to 10,000 m Planned Mustajärvi diamond drilling through spring 2026

First round drilling 3,985.3 m 15 drill holes completed in first 2025/26 phase

First tranche proceeds $3.79 million Non-brokered private placement closed Aug 5, 2025

Upsized placement $7 million Target total raise announced Jul 18, 2025

Units issued 94.7 million units First tranche at $0.04 per unit with warrants

Market Reality Check

Price: $0.4380 Vol: Volume 18,605 is 41% abov...

normal vol

$0.4380 Last Close

Volume Volume 18,605 is 41% above 20-day average of 13,238 ahead of the results release. normal

Technical Price at 0.30035 is trading below the 200-day MA of 0.33 despite positive drill results.

Peers on Argus

Several Basic Materials/Gold peers also traded lower, including NFLDF -2.13%, TI...

Several Basic Materials/Gold peers also traded lower, including NFLDF -2.13%, TINFF -5.66%, and ICMFF -5.23%, while others were flat, suggesting mixed sector sentiment rather than a clear coordinated move.

Historical Context

5 past events · Latest: Dec 08 (Positive)

Pattern 5 events

Date	Event	Sentiment	Move	Catalyst
Dec 08	Drill results	Positive	+1.9%	Strong Mustajärvi East Zone intercepts extending high-grade mineralization.
Nov 18	Drill program update	Neutral	-2.5%	Sarvi drill program completion and corporate update including director resignation.
Oct 27	Drill results	Positive	+9.7%	First 2025 Mustajärvi holes with multiple high-grade East Zone intercepts.
Aug 05	Private placement	Positive	+1.0%	First tranche closing of non-brokered financing to fund exploration.
Jul 18	Private placement	Positive	+14.3%	Upsizing of planned financing to $7M to support drill programs.

Pattern Detected

Recent Mustajärvi drill news and financing updates have generally coincided with positive or mildly positive next-day price reactions.

Recent Company History

Over the last six months, FireFox reported key exploration and financing milestones at Mustajärvi and across its Finnish portfolio. On Jul 18, 2025, it upsized a private placement to $7 million, followed by closing a first tranche of $3.79 million on Aug 5, 2025. High-grade Mustajärvi East Zone results on Oct 27, 2025 and further strong intercepts on Dec 8, 2025 supported a planned ~10,000 m drill program through spring 2026. The current release continues that high-grade narrative at the East Zone.

Market Pulse Summary

This announcement highlights further high-grade drill intercepts at Mustajärvi’s East Zone, includin...

Analysis

This announcement highlights further high-grade drill intercepts at Mustajärvi’s East Zone, including 13.75 g/t Au over 12.4 m and deeper intervals such as 17.71 g/t Au over 5.7 m. It forms part of an up to 10,000 m program through spring 2026, following earlier 2025 results from the same trend. Investors may watch for remaining assays, follow-up step-outs, and how continued exploration ties back to the recently funded programs and overall project scale.

Key Terms

ultramafic volcanic rocks, fire assay, ICP-MS, ISO/IEC 17025:2017, +3 more

7 terms

ultramafic volcanic rocks technical

"overlying ultramafic volcanic rocks. High-grade gold mineralization starts"

Ultramafic volcanic rocks are very dense, low-silica rocks formed from magma that comes from deep within the Earth’s mantle, rich in iron and magnesium. They matter to investors because these rocks often host concentrations of valuable metals — such as nickel, chromium, and platinum-group elements — so their presence can signal a higher chance of economically interesting mineral deposits, influencing exploration value and mining prospects.

fire assay technical

"shipped to the ALS facility in Rosia Montana, Romania for gold by fire assay"

Fire assay is a laboratory process used to accurately measure the amount of precious metals, like gold or silver, in a sample of ore or material. It involves heating the sample intensely to separate the metals from other substances, much like melting and purifying metal to determine its purity. This method is important to investors because it provides precise data on the metal content, helping to assess the value of mining operations or mineral deposits.

ICP-MS technical

"measured after four-acid digestion by ICP-AES and ICP-MS (method ME-MS61)"

Inductively Coupled Plasma Mass Spectrometry (ICP-MS) is a scientific technique used to detect and measure very small amounts of metals and other elements in a sample. It works like a highly sensitive scanner, helping researchers identify the presence of specific materials with great accuracy. For investors, understanding ICP-MS is important because it highlights advanced methods used in industries such as mining, environmental testing, and manufacturing, influencing the valuation and risks of related companies.

ISO/IEC 17025:2017 regulatory

"hub laboratories, including the Irish facility, are accredited to ISO/IEC 17025:2017"

An international standard that sets requirements for the competence, impartiality and consistent operation of testing and calibration laboratories. It tells labs how to produce reliable, traceable test results—like a detailed recipe and quality checklist to make sure measurements are done the same way every time. Investors care because lab accreditation reduces the risk of faulty product claims, regulatory problems or costly retesting, supporting trust in reported data and commercial claims.

qualified person regulatory

"is a qualified person as defined by National Instrument 43-101"

A qualified person is someone with specialized knowledge, experience, and training in a particular field, allowing them to accurately assess and verify information or work. Their expertise helps ensure that reports, evaluations, or decisions are trustworthy and meet required standards. For investors, a qualified person provides confidence that the information they rely on is credible and properly validated.

National Instrument 43-101 regulatory

"qualified person as defined by National Instrument 43-101"

National Instrument 43-101 is a set of rules and guidelines that govern how mineral exploration and mining companies must report information about their projects. It ensures that the details shared with investors are accurate, consistent, and reliable—similar to how a detailed, verified blueprint ensures a building’s safety. This helps investors make informed decisions based on trustworthy information about a company's mineral resources.

QA/QC technical

"with due attention to quality assurance and quality control, including sampling ¼ core"

QA/QC stands for Quality Assurance and Quality Control, processes used to ensure products or services meet certain standards. Think of it as a way to check that a product is safe and works properly before reaching consumers, similar to how a chef tastes food before serving it. For investors, strong QA/QC practices indicate a company's commitment to delivering reliable, high-quality offerings, reducing risks and building trust.

AI-generated analysis. Not financial advice.

SODANKYLÄ, FINLAND / ACCESS Newswire / December 8, 2025 / FireFox Gold Corp. (TSX.V:FFOX)(OTCQB:FFOXF)("FireFox" or the "Company") is pleased to report results from an additional four holes of its 2025/26 diamond drilling program at the Company's 100%-held Mustajärvi Gold Project in Lapland, Finland. Drill hole 25MJ005 is among the best holes yet drilled on the property, extending both shallow and deeper high-grade gold zones well to the west from previous drilling at the East Zone. Highlighted intervals are shown below:

• 12.4 metres averaging 13.75 g/t Au from 37.9 metres

• 3.75 metres averaging 19.65 g/t Au from 99.85 metres

• 5.7 metres averaging 17.71 g/t Au from 217.0 metres

The four holes reported in this release (25MJ005 - 25MJ008) test for extensions of mineralization in the East and Northeast Zones (Figure 1). Each hole intersected gold-elevated zones, including high-grade intercepts as shown in Table 1, and provided useful information about the controls on and continuation of the mineralized system at the Mustajärvi Project.

Carl Löfberg, FireFox's CEO, commented about the new results, "Drill hole 25MJ005 is an outstanding result for the growth of the Mustajärvi discovery. Combined with drill hole 25MJ001, these two holes demonstrate continuity of the East Zone gold system well to the southwest from the high-grade core we discovered in 2022. Even better, the system seems to be strengthening in this most recent hole over the 45-metre step out from 25MJ001, as both gold and tellurium grades increase. Both of these holes confirmed a strong electrical geophysics anomaly with stacked intervals of high-grade gold. Both the shallow (<100m depth) and deeper lodes appear to demonstrate similar geochemistry and alteration over more than 200 metres of strike. The reliability of our geophysical toolkit combined with the high grade and improving continuity around the East Zone discovery are important because our team can now use this knowledge to infill and expand the East Zone, as well as test other targets at Mustajärvi. Drilling continues and we have a lot more drill holes to come!"

This work is part of the ongoing program of up to 10,000 metres of diamond drilling planned for Mustajärvi through spring of 2026. The program mixes infill and step-out drilling at existing mineralized zones, and it also tests some new targets both proximal and distal to the main mineralized structures. The team completed the first round of drilling in late October, including 15 drill holes totalling 3985.3 metres. Final assays are pending for the remaining seven holes from the first phase. The team are now conducting the second round of drilling, which is expected to run to the end of January 2026.

Mustajärvi Project and Drill Program Summary

The Mustajärvi Project lies along the highway between the cities of Kittilä and Sodankylä, approximately 17 kilometres east of Kittilä. The project is at a relatively early stage as FireFox and predecessor companies have drilled approximately 15,752 metres prior to the commencement of this program. Drilling has so far delineated three different lodes of gold mineralization along more than 1.5 kilometres of strike. Of the newly reported drill holes 25MJ005, 25MJ006 and 25MJ008 tested for extensions to the East Zone mineralization in three directions, while 25MJ007 tested a gap within the Northeast Zone drilling (Figure 1).

Figure 1. Drill hole locations at Mustajärvi highlighting recent holes

Drill hole 25MJ005 tested the conductive zone previously identified by fixed loop electro-magnetic (FLEM) geophysical survey (reported February 20, 2025). An earlier hole from this program, 25MJ001, was collared 45 metres to the northeast and intersected stacked intervals of high-grade gold mineralization coinciding with the conductor, as reported on October 27, 2025.

This hole was collared in thin glacial sediments (approximately 9.0 metres deep), overlying ultramafic volcanic rocks. High-grade gold mineralization starts immediately after the contact between ultramafic volcanic rocks and intensely albite-altered and silicified intermediate tuffites. Gold here is associated with patchy and semi-massive pyrite mineralization, accompanied by quartz-carbonate-tourmaline-pyrite (QCTP) veining and brecciation. The first mineralized interval yielded a high-grade gold zone of 12.4 metres averaging 13.75 g/t Au from 37.9 metres downhole, including 4.1 metres averaging 37.45 g/t Au (Figure 2). This high-grade zone is adjacent to a mafic dike or sill (sometimes the dikes are of ultramafic composition), which is a recurring theme for the high-grade zones at Mustajärvi.

Figure 2. Highly mineralized interval from 25MJ005 with selected assays - note pervasive albite alteration (pink), abundant pyrite, and tourmaline (black) and crosscutting mafic dike.

Another high grade-grade gold interval of note was intersected from 99.85 metres downhole returning 3.75 metres averaging 19.65 g/t Au, including 0.8 metres at 53.3 g/t Au and 1.0 metre at 24.6 g/t Au. Mineralization is associated with patchy and semi-massive pyrite hosted in intensely albite-altered metasediments.

These shallower intervals of high-grade gold mineralization are associated with enrichment in the typical suite of pathfinder elements seen at the Mustajärvi East, Northeast, and Central Zones: bismuth (Bi), tellurium (Te), molybdenum (Mo), selenium (Se), and cobalt (Co).

Importantly, the hole intersected deeper high-grade gold mineralization from 217.0 metres associated with a fault-breccia zone with quartz infill and lacking pyrite mineralization (Figure 3). This deeper interval yielded 5.7 metres averaging 17.71 g/t Au, including 1.4 metres at 48.7 g/t Au (the longer interval includes 1.4 metres of core loss). In addition to being much lower in pyrite and albite, the trace element geochemistry of this lower interval is somewhat different, most notably lower in Bi and Mo.

In addition, there are multiple narrow intervals of anomalous gold intersected between 239 metres depth and the end of the hole (305.5m), including four individual intercepts grading between 0.55 g/t Au and 1.19 g/t Au.

Figure 3. Highly mineralized fault breccia from deeper in 25MJ005 with selected assays - note the lower albite content and less pyrite associated with the gold.

Drill hole 25MJ006 extended the fence of holes made by 25MJ002 to 25MJ004 (See Company news release dated October 27, 2025). It was collared 125 metres further to the northwest (Figure 1) to test the lithological controls of mineralization in this direction. The hole drilled intensely altered metasediments and intersected three narrow mineralized intervals above 0.5 g/t Au. The most notable interval was at 145 metres depth and returned 1.0m at 16.8 g/t Au. The high-grade mineralization is associated with a brecciated interval including QCTP veining within intensely altered metasediments.

Drill hole 25MJ008 was designed to test for an eastern continuation of the East Zone. The hole was collared in thin glacial sediments (approximately 8.4 metres deep) overlying Savukoski Group ultramafic volcanics. The hole intersected a mineralized contact between the ultramafic volcanic rocks and intensely albite-altered metasediments with QCTP veining at 143.8 metres, where a 1 metre interval yielded 0.65 g/t Au. The best intercept in the hole returned 2.13 g/t Au over 1.7 metres starting from 181.0 metres, hosted in strongly albite-altered intermediate tuffites with QCTP veining.

Drill hole 25MJ007 was the first hole of the program to revisit the Northeast Zone. Limited previous drilling in this zone identified altered metasediment sequences, QCTP veining, and breccias that hosted high-grade gold intervals, similar to those later encountered at the East Zone. The strongest and thickest mineralization in the area occurred in a cluster of holes at the northeastern limit of drilling in the area (see Figure 1). This included bonanza intercepts such as 1.35m averaging 93.88 g/t Au, including 0.65m at 129.5 g/t Au at 184.14 metres depth in 21MJ001 and 16.45m at 7.69 g/t Au from 154.2 metres depth in 21MJ010 (reported on June 17, 2021 and September 9, 2021, respectively).

This hole tested a gap in drilling approximately 100 metres to the west. The hole was collared in thin glacial sediments (approximately 5.8 metres deep) overlying Savukoski Group ultramafic volcanics. It passed through a contact between the ultramafic volcanic rocks and intensely albite-altered metasediments at 30.9 metres depth, cutting several intervals with anomalous gold grades. The most notable interval yielded 0.95 metres at 3.35 g/t Au from 138.15 metres depth. Mineralization is controlled by QCTP veins and veinlets with disseminated pyrite hosted in intensely albite-altered intermediate tuffites. Additional holes in the 2025/2026 program will test for a northeast extension of the Northeast Zone.

Table 1.Selected Drill Intercepts in Drillholes 25MJ005 - 25MJ008

(Cut-off Grade 0.4 g/t Au)

Drill Hole		From (m)	To (m)	Interval (m)	Au Grade (g/t)
25MJ005		37.9	50.3	12.4	13.75
	Including	45	49.1	4.1	37.45
		53.15	54.1	0.95	5.79
		59.05	60	0.95	2.43
		78.8	81.7	2.9	2.95
		99.85	103.6	3.75	19.65
	Including	99.85	100.65	0.8	53.3
	And including	101.55	102.55	1.0	24.6
		217	222.7	5.7*	17.71
	Including	218	219.4	1.4	48.7
25MJ006		103.0	104.0	1.0	0.56
		111.1	112.6	1.5	0.55
		145	146	1.0	16.8
25MJ007		138.15	139.10	0.95	3.35
		223.00	225.00	2.0	1.2
25MJ008		143.8	144.8	1.0	0.65
		174.3	175.3	1.0	0.49
		181.0	182.7	1.7	2.13
* Including 1.4 metres of core loss, which was assigned 0.0 g/t gold in interval calculations.
All intervals are core width; true width has not yet been estimated.

Table 2. Drill Collar Information (coordinates presented in EPSG:3067)

Drill Hole	Easting	Northing	Azimuth (°)	Plunge (°)	Final Depth (m)
25MJ005	428923.3	7500764	335	65	305.5
25MJ006	428958.6	7500998	320	65	167.5
25MJ007	428371.2	7500622	340	55	263.2
25MJ008	429266.2	7500957	320	45	277

Webinar

Join the FireFox team on Monday, December 8th at 1:00pm PST / 4:00pm EST for a company webinar. FireFox Gold Chairman, Patrick Highsmith, will speak with Cory Fleck about the results provided in this news release and the ongoing work at the Company's high-grade Mustajärvi Project. This discussion will also include an overview of FireFox's broader exploration strategy across its portfolio of gold projects in Finland's Central Lapland Greenstone Belt.

Attendees are encouraged to sign up in advance of the event through the registration link provided below.

Webinar Details:

Date: Monday, December 8th, 2025
Time: 1:00pm PST / 4:00pm EST
Registration: https://event.webinarjam.com/gykm4/register/nx2o0cq

Methodology & Quality Assurance

The core was transported from the rig to the Company´s core storage facility in Sodankylä, where FireFox's exploration team conducted the geological and geotechnical logging and selected the assay intervals. Assay intervals were generally 1 metre but in some circumstances were modified according to lithological boundaries and other factors. FireFox geologists maintained chain of custody and sampling procedures according to best industry practice and with due attention to quality assurance and quality control, including sampling ¼ core and crush stage duplicates and insertion of certified standard and blank samples.

FireFox team members transported the drill core samples to an ALS sample prep lab in Sodankylä or to the GeoPool Exploration Hub for core cutting. The split drill core samples were then crushed to -2 mm, split and pulverized into 1kg pulps at ALS Sodankylä, before being shipped to the ALS facility in Rosia Montana, Romania for gold by fire assay of 50 gm aliquots with AAS finish (method Au-AA26). All samples exceeding 50.0 g/t Au were re-assayed with a gravimetric finish (method Au-GRA22). Other elements, altogether 48, were measured after four-acid digestion by ICP-AES and ICP-MS (method ME-MS61) at the ALS facility located in Loughrea, Ireland.

ALS Laboratories is a leading international provider of assay and analytical data to the mining industry. All ALS geochemical hub laboratories, including the Irish facility, are accredited to ISO/IEC 17025:2017 for specific analytical procedures. The Firefox QA/QC program consists of insertion of certificated standard material and blanks inserted by Firefox into the analytical batches did not show deviations from recommended values.

Patrick Highsmith, Certified Professional Geologist (AIPG CPG # 11702) and director of the Company, is a qualified person as defined by National Instrument 43-101. Mr. Highsmith has helped prepare, reviewed, and approved the technical information in this news release.

About FireFox Gold Corp.

FireFox Gold Corp is listed on the TSX Venture Stock Exchange under the ticker symbol FFOX. FireFox also trades on the OTCQB Venture Market Exchange in the US under the ticker symbol FFOXF. The Company has been exploring for gold in Finland since 2017 on a large portfolio of ground prospective for high-grade gold deposits. The delineation of multiple gold zones at the Company's 100%-held Mustajärvi Project is paving the way for the discovery of Finland's next major gold deposit. Finland is one of the top mining investment jurisdictions in the world as indicated by its multiple top-10 rankings in recent Fraser Institute Surveys of Mining Companies. Having a strong mining law and long mining tradition, Finland remains underexplored for gold. Recent exploration results in the country have highlighted its prospectivity, and FireFox is proud to have a Finland based CEO and technical team.

For more information, please refer to the Company's website and profile on the SEDAR+ website at www.sedarplus.ca.

On behalf of the Board of Directors,

"Carl Löfberg"
Chief Executive Officer

CONTACT:
FireFox Gold Corp.
Email: info@firefoxgold.com
Telephone: +1-778-938-1994

Forward Looking Statements

Although management of the Company believes that the assumptions made and the expectations represented by such statements or information are reasonable, there can be no assurance that forward-looking statements or information herein will prove to be accurate. Forward-looking statements and information by their nature are based on assumptions and involve known and unknown risks, uncertainties and other factors which may cause actual results, performance or achievements, or industry results, to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements or information. Factors that could cause such differences include changes in the Company's exploration plans, world commodity markets, equity markets, the extent of work stoppage and economic impacts that may result from illness, extreme weather, changes in government and changes to regulations affecting the mining industry.

Forward-looking statements in this release may include statements regarding: the intent to conduct additional drilling; management's belief as to the location of the most prospective gold targets; the location of targets for future drill programs; and the current and future work program, including the extent and nature of exploration to be conducted in 2025-2026. Although we believe the expectations reflected in our forward-looking statements are reasonable, results may vary.

The forward-looking statements contained herein represent the expectations of FireFox as of the date of dissemination and, accordingly, are subject to change after such date. Readers should not place undue importance on forward-looking statements and should not rely upon this information as of any other date. FireFox does not undertake to update this information at any particular time except as required in accordance with applicable laws.

NOT FOR DISTRIBUTION TO U.S. NEWSWIRE SERVICES OR FOR RELEASE, PUBLICATION, DISTRIBUTION OR DISSEMINATION DIRECTLY, OR INDIRECTLY, IN WHOLE OR IN PART, IN OR INTO THE UNITED STATES.

SOURCE: FireFox Gold Corp.

View the original press release on ACCESS Newswire

FAQ

What were the headline assay results for FireFox (FFOXF) at Mustajärvi on December 8, 2025?

Hole 25MJ005 returned 12.4 m @ 13.75 g/t Au, 3.75 m @ 19.65 g/t Au and 5.7 m @ 17.71 g/t Au among other intercepts.

How far did the new 25MJ005 intercepts extend the East Zone at Mustajärvi (FFOXF)?

The 25MJ005 results extend continuity of the East Zone approximately a 45-metre step-out from hole 25MJ001.

How much drilling does FireFox (FFOXF) plan at Mustajärvi and what has been completed?

FireFox plans up to 10,000 metres through spring 2026; the first round completed 3,985.3 metres across 15 holes.

Are there outstanding assays or data that could change the Mustajärvi picture for FFOXF shareholders?

Yes. Final assays are still pending for seven holes from the first phase and additional drilling is ongoing.

Did any reported intercepts have core loss or sampling issues for FireFox (FFOXF)?

Yes. A deeper 5.7 m interval includes 1.4 metres of core loss that was assigned 0.0 g/t in interval calculations.

Do the reported intercepts represent true widths at Mustajärvi (FFOXF)?

No. All intervals are reported as core width; true widths have not yet been estimated.